With "Frogger's Journey: The Forgotten Relic" you get the "Punk Costume"
With "Frogger's Adventures 2: The Lost Wand" you get the "Pirate
Costume"
Hidden Costumes -
While playing "Frogger: Helmet Chaos" with one of the following GBA
games in the second cartridge slot you will unlock hidden costumes in the
"Costumes" menu.