The rhythm game is based around the song Pokémon Roll Call; a song used as an ending theme for the Cantonese dub of the Pokémon anime. The Hong Kong version of the game has the song being performed in Cantonese by Chloe So and the Taiwan version has the song being performed in Mandarin by Bagel Chiang.
The game features the original 151 Pokémon from Generation I in the same order as the song, and players tap the Pokémon as they land in a center circle in time to the music. Players get points based on how long their combo of tapping the Pokémon at the right time is, as well as how many Pokémon they successfully tap. During the choruses of the song, there is also a bonus round where players tap as many flying Pokéballs as they can.