Nintendo's flagship monster-collecting series has been lured into a DS puzzle game with the release of Pokémon Trozei. The gameplay is similar to 1993's Yoshi's Cookie on Super NES, as players race to create horizontal and vertical matches of four or more images. Replacing the multiple varieties of cookies are colorful Pokémon faces, and the playfield now spans two screens. There are also more than 380 individual Pokémon pieces to manipulate using the touch-screen stylus, with each four-in-a-row match creating one Trozei. Each Trozei combination appears on a list, and in true Pokémon fashion, players must attempt to create each one until they've "formed 'em all." Two single-player modes include Trozei Adventure, a story mode that involves freeing Pokémon from the nefarious Phobos Battalion, and Endless Trozei, where the goal is simply to play as long as possible. The game also features a head-to-head wireless mode for some collecting competition against a friend.