ref: f76f5c3583b729c8c78f23ae46ddae9254e8a906
dir: /engine/battle/move_effects/rain_dance.asm/
BattleCommand_StartRain: ld a, WEATHER_RAIN ld [wBattleWeather], a ld a, 5 ld [wWeatherCount], a call AnimateCurrentMove ld hl, DownpourText jp StdBattleTextbox