Using the DS touch screen, players must create a "trozei"; the lining up for 4 same type Pokémon in a row by re-arranging the Pokémon that fall onto the screen.
The aim isn't so much to stop them filling the screen, which is done easily, but to avoid 2 or 3 in a row and set up longer trozei of fours and fives, thus more easily reaching score and combo levels required for bonuses. Skillful players can snag rare Pokémon by lining them up with the Ditto tile, as two or more of some types rarely appear.