Class SummonPhase

Sends out a Pokemon before the battle begins and shows the appropriate messages

Enemy trainer or player trainer will do animations to throw Pokeball and summon a Pokemon to the field.

Handles tweening and battle setup for a wild Pokemon that appears outside of the normal screen transition. Wild Pokemon will ease and fade in onto the field, then perform standard summon behavior. Currently only used by Mystery Encounters, as all other battle types pre-summon wild pokemon before screen transitions.