Creates a new SwitchPhase
BattleScene Current battle scene
Field index to switch out
Indicates if the switch should be forced (true) or is optional (false).
Indicates if the party member on the field should be
recalled to ball or has already left the field. Passed to SwitchSummonPhase.
Opens the party selector UI and transitions into a
SwitchSummonPhasefor the player (if a switch would be valid for the current battle state).