Once you have spoken to the Lass in the Water Club's lounge, Imakuni appears from time to time in the Fighting Club, Science Club, Lightning Club, or Water Club lounges. He'll be dancing against the back wall while singing the PokéRap. Imakuni? is willing to duel you, on the condition to dance if he wins.
Imakuni?'s deck uses Psyduck, Slowbro, Farfetch'd and Hypno. His Pokémon are not physically powerful, and instead use disabling powers like Headache, Dark Mind, and Strange Power. His deck also uses several cards that either involve shuffling his deck, or flipping coins. To this end, he uses the Trainer card Imakuni?, which confuses his Pokémon, just so he can flip a coin.
Beating Imakuni? wins you one of each of the four booster packs. Every third win against Imakuni? results in the player being presented a Trainer card called Imakuni? rather than the aforementioned booster packs.
Imakuni?, according to his Trainer card, is an unknown creature not listed in the Pokédex. He is not human, for he is called a Strange Lifeform when players challenge him to a duel. As well, the Trainer card claims that Imakuni? wants to be played as a Basic Pokémon, but cannot be. He travels the world, posing the question to children: "Who is cuter, Pikachu or me?"