diff --git a/Abilities.json b/Abilities.json
index 0a3504b..dd79e99 100644
--- a/Abilities.json
+++ b/Abilities.json
@@ -59,9 +59,12 @@
         "effect": "Bulletproof"
     },
     "cheek_pouch": {
-        
+        "effect": "CheekPouch"
+    },
+    "chlorophyll": {
+        "effect": "DoubleSpeedInWeather",
+        "parameters": ["HarshSunlight"]
     },
-    "chlorophyll": {},
     "clear_body": {},
     "cloud_nine": {},
     "color_change": {},
diff --git a/Scripts/Abilities/DoubleSpeedInWeather.as b/Scripts/Abilities/DoubleSpeedInWeather.as
new file mode 100644
index 0000000..b8f0162
--- /dev/null
+++ b/Scripts/Abilities/DoubleSpeedInWeather.as
@@ -0,0 +1,17 @@
+namespace Gen7 {
+    [Ability effect=DoubleSpeedInWeather]
+    class DoubleSpeedInWeather : PkmnScript {
+        string _weather;
+
+        void OnInitialize(const BattleLibrary@ library, const narray<EffectParameter@>@ parameters) override {
+            _weather = parameters[0].AsString();
+        }
+
+        void ChangeSpeed(BaseTurnChoice@ choice, uint &inout speed) override {
+            auto weather = choice.User.Battle.GetWeatherName();
+            if (weather == _weather) {
+                speed *= 2;
+            }
+        };
+    }
+}
\ No newline at end of file
diff --git a/Scripts/Interfaces/PkmnScript.as b/Scripts/Interfaces/PkmnScript.as
index 46c7389..9ebb692 100644
--- a/Scripts/Interfaces/PkmnScript.as
+++ b/Scripts/Interfaces/PkmnScript.as
@@ -36,6 +36,7 @@ shared abstract class PkmnScript {
 	void ModifyDamageModifier(ExecutingMove@, Pokemon@, uint8, float &inout){};
 	void OverrideDamage(ExecutingMove@, Pokemon@, uint8, uint &inout){};
 	void OverrideIncomingDamage(ExecutingMove@, Pokemon@, uint8, uint &inout){};
+	void ChangeSpeed(BaseTurnChoice@, uint &inout){};
 	void ChangePriority(MoveTurnChoice@, int8 &inout){};
 	void OnFail(Pokemon@){};
 	void OnOpponentFail(Pokemon@){};
diff --git a/fetch_tester.sh b/fetch_tester.sh
index ee74028..9c05ff8 100755
--- a/fetch_tester.sh
+++ b/fetch_tester.sh
@@ -1,6 +1,6 @@
 #!/bin/sh
 
-TESTERVERSION=0.0.15
+TESTERVERSION=0.0.16
 
 # Get the release information from the api for the specified version
 curl -X GET "https://git.p-epsilon.com/api/v1/repos/Deukhoofd/PokemonScriptTester/releases/tags/$TESTERVERSION" -H  "accept: application/json" |