ref: 90bec40276b6a690cfa9b0a331cde183bd7f94f7
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