diff --git a/src/defines.rs b/src/defines.rs
index 3335b8d..c14ebdc 100644
--- a/src/defines.rs
+++ b/src/defines.rs
@@ -1 +1,2 @@
 pub type LevelInt = u8;
+pub const MAX_MOVES: usize = 4;
diff --git a/src/dynamic_data/libraries/battle_stat_calculator.rs b/src/dynamic_data/libraries/battle_stat_calculator.rs
new file mode 100644
index 0000000..fc2cff7
--- /dev/null
+++ b/src/dynamic_data/libraries/battle_stat_calculator.rs
@@ -0,0 +1,5 @@
+use crate::dynamic_data::models::pokemon::Pokemon;
+
+pub trait BattleStatCalculator {
+    //fn is_critical(attack: &ExecutingMove, target: &Pokemon, hit: u8);
+}
diff --git a/src/dynamic_data/libraries/dynamic_library.rs b/src/dynamic_data/libraries/dynamic_library.rs
new file mode 100644
index 0000000..3c8385d
--- /dev/null
+++ b/src/dynamic_data/libraries/dynamic_library.rs
@@ -0,0 +1,19 @@
+use crate::static_data::libraries::static_data::StaticData;
+use derive_getters::Getters;
+
+#[derive(Getters, Debug)]
+pub struct DynamicLibrary<'a> {
+    static_data: StaticData<'a>,
+}
+
+#[cfg(test)]
+pub mod test {
+    use crate::dynamic_data::libraries::dynamic_library::DynamicLibrary;
+    use crate::static_data::libraries::static_data;
+
+    pub fn build<'a>() -> DynamicLibrary<'a> {
+        DynamicLibrary {
+            static_data: static_data::test::build(),
+        }
+    }
+}
diff --git a/src/dynamic_data/libraries/mod.rs b/src/dynamic_data/libraries/mod.rs
new file mode 100644
index 0000000..aa0bc6c
--- /dev/null
+++ b/src/dynamic_data/libraries/mod.rs
@@ -0,0 +1,2 @@
+pub mod battle_stat_calculator;
+pub mod dynamic_library;
diff --git a/src/dynamic_data/mod.rs b/src/dynamic_data/mod.rs
new file mode 100644
index 0000000..bf17f0d
--- /dev/null
+++ b/src/dynamic_data/mod.rs
@@ -0,0 +1,3 @@
+pub mod libraries;
+pub mod models;
+pub mod script_handling;
diff --git a/src/dynamic_data/models/battle.rs b/src/dynamic_data/models/battle.rs
new file mode 100644
index 0000000..455a8c4
--- /dev/null
+++ b/src/dynamic_data/models/battle.rs
@@ -0,0 +1,2 @@
+#[derive(Debug)]
+pub struct Battle {}
diff --git a/src/dynamic_data/models/battle_side.rs b/src/dynamic_data/models/battle_side.rs
new file mode 100644
index 0000000..ac78762
--- /dev/null
+++ b/src/dynamic_data/models/battle_side.rs
@@ -0,0 +1,2 @@
+#[derive(Debug)]
+pub struct BattleSide {}
diff --git a/src/dynamic_data/models/learned_move.rs b/src/dynamic_data/models/learned_move.rs
new file mode 100644
index 0000000..d944840
--- /dev/null
+++ b/src/dynamic_data/models/learned_move.rs
@@ -0,0 +1 @@
+pub struct LearnedMove {}
diff --git a/src/dynamic_data/models/mod.rs b/src/dynamic_data/models/mod.rs
new file mode 100644
index 0000000..e230b40
--- /dev/null
+++ b/src/dynamic_data/models/mod.rs
@@ -0,0 +1,4 @@
+pub mod battle;
+pub mod battle_side;
+pub mod learned_move;
+pub mod pokemon;
diff --git a/src/dynamic_data/models/pokemon.rs b/src/dynamic_data/models/pokemon.rs
new file mode 100644
index 0000000..7fc23da
--- /dev/null
+++ b/src/dynamic_data/models/pokemon.rs
@@ -0,0 +1,143 @@
+use crate::defines::{LevelInt, MAX_MOVES};
+use crate::dynamic_data::libraries::dynamic_library::DynamicLibrary;
+use crate::dynamic_data::models::battle::Battle;
+use crate::dynamic_data::models::battle_side::BattleSide;
+use crate::dynamic_data::models::learned_move::LearnedMove;
+use crate::dynamic_data::script_handling::script::Script;
+use crate::dynamic_data::script_handling::script_set::ScriptSet;
+use crate::static_data::items::item::Item;
+use crate::static_data::species_data::ability_index::AbilityIndex;
+use crate::static_data::species_data::form::Form;
+use crate::static_data::species_data::gender::Gender;
+use crate::static_data::species_data::species::Species;
+use crate::static_data::statistic_set::StatisticSet;
+use crate::static_data::statistics::Statistic;
+use derive_getters::Getters;
+use std::collections::HashSet;
+
+#[derive(Getters)]
+pub struct PokemonBattleData<'a> {
+    battle: &'a Battle,
+    battle_side: &'a BattleSide,
+    on_battle_field: bool,
+    seen_opponents: HashSet<Pokemon<'a>>,
+}
+
+#[derive(Getters)]
+pub struct Pokemon<'a> {
+    library: &'a DynamicLibrary<'a>,
+    species: &'a Species<'a>,
+    form: &'a Form<'a>,
+
+    display_species: Option<&'a Species<'a>>,
+    display_form: Option<&'a Form<'a>>,
+
+    level: LevelInt,
+    experience: u32,
+    unique_identifier: u32,
+    gender: Gender,
+    coloring: u8,
+    held_item: Option<&'a Item>,
+    health: u32,
+
+    stat_boost: StatisticSet<i8>,
+    flat_stats: StatisticSet<u16>,
+    boosted_stats: StatisticSet<u16>,
+
+    nickname: Option<String>,
+
+    ability_index: AbilityIndex,
+    is_ability_overridden: bool,
+    overridden_ability_name: String,
+
+    battle_data: Option<PokemonBattleData<'a>>,
+
+    moves: [Option<LearnedMove>; MAX_MOVES],
+    allowed_experience: bool,
+
+    types: Vec<u8>,
+
+    ability_script: Option<Box<dyn Script>>,
+    status_script: Option<Box<dyn Script>>,
+    volatile: ScriptSet,
+}
+
+impl<'a> Pokemon<'a> {
+    pub fn new(
+        library: &'a DynamicLibrary,
+        species: &'a Species,
+        form: &'a Form,
+        ability: AbilityIndex,
+        level: LevelInt,
+        unique_identifier: u32,
+        gender: Gender,
+        coloring: u8,
+    ) -> Pokemon<'a> {
+        // Calculate experience from the level for the specified growth rate.
+        let experience = library
+            .static_data()
+            .growth_rates()
+            .calculate_experience(species.growth_rate(), level);
+        let health = form.get_base_stat(Statistic::HP) as u32;
+        Pokemon {
+            library,
+            species,
+            form,
+            display_species: None,
+            display_form: None,
+            level,
+            experience,
+            unique_identifier,
+            gender,
+            coloring,
+            held_item: None,
+            health,
+            stat_boost: Default::default(),
+            flat_stats: *form.base_stats(),
+            boosted_stats: *form.base_stats(),
+            nickname: None,
+            ability_index: ability,
+            is_ability_overridden: false,
+            overridden_ability_name: "".to_string(),
+            battle_data: None,
+            moves: [None, None, None, None],
+            allowed_experience: false,
+            types: form.types().to_vec(),
+            ability_script: None,
+            status_script: None,
+            volatile: ScriptSet {},
+        }
+    }
+}
+
+#[cfg(test)]
+pub mod test {
+    use crate::dynamic_data::libraries::dynamic_library;
+    use crate::dynamic_data::models::pokemon::Pokemon;
+    use crate::static_data::libraries::data_library::DataLibrary;
+    use crate::static_data::species_data::ability_index::AbilityIndex;
+    use crate::static_data::species_data::gender::Gender;
+
+    #[test]
+    fn construct_pokemon() {
+        let lib = dynamic_library::test::build();
+        let species = lib.static_data().species().get("foo").unwrap();
+        let form = species.get_form("default").unwrap();
+
+        let pokemon = Pokemon::new(
+            &lib,
+            species,
+            form,
+            AbilityIndex {
+                hidden: false,
+                index: 0,
+            },
+            10,
+            0,
+            Gender::Male,
+            0,
+        );
+        assert_eq!(pokemon.species.name(), "foo");
+        assert_eq!(pokemon.form.name(), "default");
+    }
+}
diff --git a/src/dynamic_data/script_handling/mod.rs b/src/dynamic_data/script_handling/mod.rs
new file mode 100644
index 0000000..5821ee2
--- /dev/null
+++ b/src/dynamic_data/script_handling/mod.rs
@@ -0,0 +1,2 @@
+pub mod script;
+pub mod script_set;
diff --git a/src/dynamic_data/script_handling/script.rs b/src/dynamic_data/script_handling/script.rs
new file mode 100644
index 0000000..3f2da9d
--- /dev/null
+++ b/src/dynamic_data/script_handling/script.rs
@@ -0,0 +1 @@
+pub trait Script {}
diff --git a/src/dynamic_data/script_handling/script_set.rs b/src/dynamic_data/script_handling/script_set.rs
new file mode 100644
index 0000000..8a1a6b4
--- /dev/null
+++ b/src/dynamic_data/script_handling/script_set.rs
@@ -0,0 +1 @@
+pub struct ScriptSet {}
diff --git a/src/lib.rs b/src/lib.rs
index 41acbc3..7fc7187 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -1,10 +1,12 @@
 // The too many arguments is annoying, especially for when we create constructors, disable.
 #![allow(clippy::too_many_arguments, clippy::needless_range_loop)]
 #![feature(nll)]
+#![feature(in_band_lifetimes)]
 
 #[macro_use]
 extern crate maplit;
 
 pub mod defines;
+pub mod dynamic_data;
 pub mod static_data;
 pub mod utils;
diff --git a/src/static_data/libraries/growth_rate_library.rs b/src/static_data/libraries/growth_rate_library.rs
index 6a11eae..c24e99e 100644
--- a/src/static_data/libraries/growth_rate_library.rs
+++ b/src/static_data/libraries/growth_rate_library.rs
@@ -33,12 +33,11 @@ impl Debug for GrowthRateLibrary {
 }
 
 #[cfg(test)]
-mod tests {
+pub mod tests {
     use crate::static_data::growth_rates::lookup_growth_rate::LookupGrowthRate;
     use crate::static_data::libraries::growth_rate_library::GrowthRateLibrary;
 
-    #[test]
-    fn add_growth_rate_to_library_and_calculate_level() {
+    pub fn build() -> GrowthRateLibrary {
         let mut lib = GrowthRateLibrary::new(1);
 
         // Borrow as mut so we can insert
@@ -46,24 +45,20 @@ mod tests {
         w.add_growth_rate("foo", Box::new(LookupGrowthRate::new(vec![0, 5, 10, 100])));
         // Drops borrow as mut
 
-        // Borrow as read so we can read
-        let r = &lib;
-        assert_eq!(r.calculate_level("foo", 3), 1);
-        assert_eq!(r.calculate_level("foo", 50), 3);
+        lib
+    }
+
+    #[test]
+    fn add_growth_rate_to_library_and_calculate_level() {
+        let lib = build();
+        assert_eq!(lib.calculate_level("foo", 3), 1);
+        assert_eq!(lib.calculate_level("foo", 50), 3);
     }
 
     #[test]
     fn add_growth_rate_to_library_and_calculate_experience() {
-        let mut lib = GrowthRateLibrary::new(1);
-
-        // Borrow as mut so we can insert
-        let w = &mut lib;
-        w.add_growth_rate("foo", Box::new(LookupGrowthRate::new(vec![0, 5, 10, 100])));
-        // Drops borrow as mut
-
-        // Borrow as read so we can read
-        let r = &lib;
-        assert_eq!(r.calculate_experience("foo", 1), 0);
-        assert_eq!(r.calculate_experience("foo", 3), 10);
+        let lib = build();
+        assert_eq!(lib.calculate_experience("foo", 1), 0);
+        assert_eq!(lib.calculate_experience("foo", 3), 10);
     }
 }
diff --git a/src/static_data/libraries/item_library.rs b/src/static_data/libraries/item_library.rs
index 6924ca0..470fbea 100644
--- a/src/static_data/libraries/item_library.rs
+++ b/src/static_data/libraries/item_library.rs
@@ -30,3 +30,33 @@ impl DataLibrary<'_, Item> for ItemLibrary {
         (&mut self.map, &mut self.list)
     }
 }
+
+#[cfg(test)]
+pub mod tests {
+    use crate::static_data::items::item::Item;
+    use crate::static_data::items::item_category::{BattleItemCategory, ItemCategory};
+    use crate::static_data::libraries::data_library::DataLibrary;
+    use crate::static_data::libraries::item_library::ItemLibrary;
+    use std::collections::HashSet;
+
+    fn build_item() -> Item {
+        Item::new(
+            "foo",
+            ItemCategory::MiscItem,
+            BattleItemCategory::MiscBattleItem,
+            100,
+            HashSet::new(),
+        )
+    }
+
+    pub fn build() -> ItemLibrary {
+        let mut lib = ItemLibrary::new(1);
+        let m = build_item();
+        // Borrow as mut so we can insert
+        let w = &mut lib;
+        w.add("foo", m);
+        // Drops borrow as mut
+
+        lib
+    }
+}
diff --git a/src/static_data/libraries/library_settings.rs b/src/static_data/libraries/library_settings.rs
index be45ee5..d05e10e 100644
--- a/src/static_data/libraries/library_settings.rs
+++ b/src/static_data/libraries/library_settings.rs
@@ -3,6 +3,5 @@ use derive_getters::Getters;
 
 #[derive(Getters, Debug)]
 pub struct LibrarySettings {
-    maximum_level: LevelInt,
-    maximum_move_count: u8,
+    pub(crate) maximum_level: LevelInt,
 }
diff --git a/src/static_data/libraries/move_library.rs b/src/static_data/libraries/move_library.rs
index cf00d77..aa48fff 100644
--- a/src/static_data/libraries/move_library.rs
+++ b/src/static_data/libraries/move_library.rs
@@ -30,3 +30,38 @@ impl DataLibrary<'_, MoveData> for MoveLibrary {
         (&mut self.map, &mut self.list)
     }
 }
+
+#[cfg(test)]
+pub mod tests {
+    use crate::static_data::libraries::data_library::DataLibrary;
+    use crate::static_data::libraries::move_library::MoveLibrary;
+    use crate::static_data::moves::move_data::{MoveCategory, MoveData, MoveTarget};
+    use crate::static_data::moves::secondary_effect::SecondaryEffect;
+    use std::collections::HashSet;
+
+    fn build_move() -> MoveData {
+        MoveData::new(
+            "foo",
+            0,
+            MoveCategory::Physical,
+            100,
+            100,
+            30,
+            MoveTarget::Any,
+            0,
+            SecondaryEffect::empty(),
+            HashSet::new(),
+        )
+    }
+
+    pub fn build() -> MoveLibrary {
+        let mut lib = MoveLibrary::new(1);
+        let m = build_move();
+        // Borrow as mut so we can insert
+        let w = &mut lib;
+        w.add("foo", m);
+        // Drops borrow as mut
+
+        lib
+    }
+}
diff --git a/src/static_data/libraries/species_library.rs b/src/static_data/libraries/species_library.rs
index 9f7cc79..2be91d1 100644
--- a/src/static_data/libraries/species_library.rs
+++ b/src/static_data/libraries/species_library.rs
@@ -32,7 +32,7 @@ impl<'a> DataLibrary<'a, Species<'a>> for SpeciesLibrary<'a> {
 }
 
 #[cfg(test)]
-mod tests {
+pub mod tests {
     use crate::static_data::libraries::data_library::DataLibrary;
     use crate::static_data::libraries::species_library::SpeciesLibrary;
     use crate::static_data::species_data::form::Form;
@@ -64,16 +64,21 @@ mod tests {
         )
     }
 
-    #[test]
-    fn add_species_to_library_and_fetch() {
+    pub fn build<'a>() -> SpeciesLibrary<'a> {
         let mut lib = SpeciesLibrary::new(1);
         let species = build_species();
-
         // Borrow as mut so we can insert
         let w = &mut lib;
         w.add("foo", species);
         // Drops borrow as mut
 
+        lib
+    }
+
+    #[test]
+    fn add_species_to_library_and_fetch() {
+        let lib = build();
+
         // Borrow as read so we can read
         let r = &lib;
         let mon = r.get("foo");
@@ -85,14 +90,9 @@ mod tests {
 
     #[test]
     fn add_species_to_library_then_remove() {
-        let mut lib = SpeciesLibrary::new(1);
-        let species = build_species();
+        let mut lib = build();
 
-        // Borrow as mut so we can insert
-        let w = &mut lib;
-        w.add("foo", species);
-        w.remove("foo");
-        // Drops borrow as mut
+        lib.remove("foo");
 
         // Borrow as read so we can read
         let r = &lib;
diff --git a/src/static_data/libraries/static_data.rs b/src/static_data/libraries/static_data.rs
index 11587d6..0628acd 100644
--- a/src/static_data/libraries/static_data.rs
+++ b/src/static_data/libraries/static_data.rs
@@ -7,7 +7,7 @@ use crate::static_data::libraries::type_library::TypeLibrary;
 use derive_getters::Getters;
 
 #[derive(Getters, Debug)]
-struct StaticData<'a> {
+pub struct StaticData<'a> {
     settings: LibrarySettings,
     species: SpeciesLibrary<'a>,
     moves: MoveLibrary,
@@ -15,3 +15,23 @@ struct StaticData<'a> {
     growth_rates: GrowthRateLibrary,
     types: TypeLibrary,
 }
+
+#[cfg(test)]
+pub mod test {
+    use crate::static_data::libraries::library_settings::LibrarySettings;
+    use crate::static_data::libraries::static_data::StaticData;
+    use crate::static_data::libraries::{
+        growth_rate_library, item_library, move_library, species_library, type_library,
+    };
+
+    pub fn build<'a>() -> StaticData<'a> {
+        StaticData {
+            settings: LibrarySettings { maximum_level: 100 },
+            species: species_library::tests::build(),
+            moves: move_library::tests::build(),
+            items: item_library::tests::build(),
+            growth_rates: growth_rate_library::tests::build(),
+            types: type_library::tests::build(),
+        }
+    }
+}
diff --git a/src/static_data/libraries/type_library.rs b/src/static_data/libraries/type_library.rs
index 0e1bb41..396adfd 100644
--- a/src/static_data/libraries/type_library.rs
+++ b/src/static_data/libraries/type_library.rs
@@ -46,10 +46,25 @@ impl TypeLibrary {
 }
 
 #[cfg(test)]
-mod tests {
+pub mod tests {
     use crate::static_data::libraries::type_library::TypeLibrary;
     use assert_approx_eq::assert_approx_eq;
 
+    pub fn build() -> TypeLibrary {
+        let mut lib = TypeLibrary::new(2);
+
+        // Borrow as mut so we can insert
+        let w = &mut lib;
+        w.register_type("foo");
+        w.register_type("bar");
+        // Drops borrow as mut
+
+        w.set_effectiveness(0, 1, 0.5);
+        w.set_effectiveness(1, 0, 2.0);
+
+        lib
+    }
+
     #[test]
     fn add_two_types_retrieve_them() {
         let mut lib = TypeLibrary::new(2);
diff --git a/src/static_data/moves/move_data.rs b/src/static_data/moves/move_data.rs
index ab53518..a210588 100644
--- a/src/static_data/moves/move_data.rs
+++ b/src/static_data/moves/move_data.rs
@@ -44,7 +44,7 @@ pub struct MoveData {
 
 impl MoveData {
     pub fn new(
-        name: String,
+        name: &str,
         move_type: u8,
         category: MoveCategory,
         base_power: u8,
@@ -56,7 +56,7 @@ impl MoveData {
         flags: HashSet<String>,
     ) -> MoveData {
         MoveData {
-            name,
+            name: name.to_string(),
             move_type,
             category,
             base_power,
diff --git a/src/static_data/species_data/learnable_moves.rs b/src/static_data/species_data/learnable_moves.rs
index 22976b0..dfc7ca1 100644
--- a/src/static_data/species_data/learnable_moves.rs
+++ b/src/static_data/species_data/learnable_moves.rs
@@ -47,7 +47,7 @@ mod tests {
     fn adds_level_moves() {
         let mut moves = LearnableMoves::new();
         let move1 = MoveData::new(
-            "foo".to_string(),
+            "foo",
             0,
             MoveCategory::Physical,
             0,
@@ -59,7 +59,7 @@ mod tests {
             Default::default(),
         );
         let move2 = MoveData::new(
-            "bar".to_string(),
+            "bar",
             0,
             MoveCategory::Physical,
             0,
@@ -83,7 +83,7 @@ mod tests {
     fn adds_two_same_moves_at_different_level() {
         let mut moves = LearnableMoves::new();
         let move1 = MoveData::new(
-            "foo".to_string(),
+            "foo",
             0,
             MoveCategory::Physical,
             0,
diff --git a/src/static_data/statistic_set.rs b/src/static_data/statistic_set.rs
index 91ba01c..77ef274 100644
--- a/src/static_data/statistic_set.rs
+++ b/src/static_data/statistic_set.rs
@@ -2,7 +2,7 @@ use super::statistics::Statistic;
 use derive_getters::Getters;
 use num_traits::PrimInt;
 
-#[derive(Default, Eq, PartialEq, Debug, Getters)]
+#[derive(Default, Eq, PartialEq, Copy, Clone, Debug, Getters)]
 pub struct StatisticSet<T>
 where
     T: PrimInt,