Pirate costume - Have the Game Boy Advance game Frogger's Adventures 2: The Lost Wand in the cartridge slot to unlock the Pirate costume.
Punk costume - Have the Game Boy Advance game Frogger's Journey: The Forgotten Relic in the cartridge slot to unlock the Punk costume.
Santa costume - Have the Game Boy Advance game Frogger's Adventures: Temple Of The Frog in the cartridge slot to unlock the Santa costume.