ref: 8ed7c392cd73f9316c65b10b543c8074d5e46061
dir: /engine/battle/move_effects/sunny_day.asm/
BattleCommand_StartSun: ld a, WEATHER_SUN ld [wBattleWeather], a ld a, 5 ld [wWeatherCount], a call AnimateCurrentMove ld hl, SunGotBrightText jp StdBattleTextbox