If it is right after a battle chances are your Pokemon got poisoned and it will keep flashing until you either heal it or it faints.
They disappear forever.
Nothing happens.
You start a new game and start over.
i guess nothing
its impossible
if you did, congradulations! you beat the whole game!
Turn of the game
YOU Win The Game DUMMy What ELse
Get a action replay and cheat your game its at game stop.
Its for me to know and you to find out. play the game.
you win the game.
Pokemon pearl is just like any other Pokemon game : you've got to catch em all