Optional
target: defaultOptional
oppAnim: booleanProtected
isProtected
isOptional
onSubstitute: booleanOptional
callback: FunctionOptional
frameTimedEventPriority: 0 | 1 | 3 | 50 is behind all other sprites (except BG)
Optional
callback: Function
Will attempt to play as much of an animation as possible, even if not all targets are on the field. Will also play the animation, even if the user has selected "Move Animations" OFF in Settings. Exclusively used by MEs atm, for visual animations at the start of an encounter.