From Bulbapedia, the community-driven Pokémon encyclopedia.
GO, Poliwrath! (Japanese: およげ! ニョロボン Swim! Nyorobon) is the name of a Pokémon-based e-Reader application from the Expedition Base Set. It is a minigame featuring Poliwrath. Six cards are required to play GO, Poliwrath!: Poliwrath, Poliwhirl, Krabby, Marill, Poliwag and Shellder.
In GO, Poliwrath!, the player takes on the role of a Poliwrath. The objective of the game is to win a race against a Marill and a Golduck with the fastest time possible. The player loses the game if Marill or Golduck finishes the race before Poliwrath does.