While playing "Frogger: Helmet Chaos" with one of the following GBA games in the second cartrige slot you will unlock hidden costumes in the "Costumes" menu.
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"
Contributed By: Cloud20390.
Insert Frogger's Adventures - Temple of the Frog into the GBA slot in your DS to unlock the Santa costume in Helmet Chaos.
Contributed By: wizardofwor.
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