Play Kappa no Kai-Kata - Katan Daibouken (J)(Supplex) Online

Kappa no Kai-Kata - Katan Daibouken is a Japan-exclusive Game Boy Advance title from 2004, developed by KCEJ and published by Konami. It arrived late in the GBA's life, a time when developers were still finding inventive ways to use the hardware, and it stands out as a quirky, lesser-known entry in the platform's library.

You control a kappa, a water sprite from Japanese folklore, navigating a series of side-scrolling stages. Your main goal is to rescue other kappas by exploring levels, flipping switches, and defeating enemies with a signature suplex move. The game emphasizes puzzle-solving; you often use cucumbers to lure or distract foes, and platforming requires careful jumps and timed attacks. The pacing is deliberate, with levels that encourage observation rather than rushing ahead. It feels like a strange, charming puzzle-platformer where every action has a tangible, sometimes silly, consequence.