More work on WASM handling.

src/dynamic_data/choices.rs

@@ -29,6 +29,7 @@ struct CommonChoiceData<'user, 'library> {
 
 /// This enum defines a single choice for a Pokemon for a battle turn.
 #[derive(Debug)]
+#[cfg_attr(feature = "wasm", derive(unique_type_id_derive::UniqueTypeId))]
 pub enum TurnChoice<'user, 'library> {
     /// A move choice tells a Pokemon to use a move on a target for this turn.
     Move(MoveChoice<'user, 'library>),