The trainer intro was the only enemy send-out path that never set
enemySendingOut, so the front sprite drew at full size the moment the
trainer pic walked off, held through "X sent out Y!", and the grow-in
then played over a mon that had already arrived. Set it with the pic
teardown and clear it with startGrowIn, matching the mid-battle
replacement and the player's own send-out.
Also repairs two parity suites that could not load at all: their game
stubs lacked input.isDown, which battle text has read every frame since
typing started honouring PrintLetterDelay. intro_chrome additionally
pressed A inside PromptText's ProtectedDelay3 hold, which ignores the
button for TEXT_PRE_ADVANCE frames.
spiritsnails
bryanthaboi