From Bulbapedia, the community-driven Pokémon encyclopedia.

Tomoaki Imakuni, usually referred to as "Imakuni?" (イマクニ？, "Imakuni?"), is an eccentric Japanese musician who performed some of the music for the Pokémon anime. He also was heavily involved in promoting the TCG and ended up being pictured or drawing art for several of the cards.

In Pokémon Card GB

Imakuni? appears as a special hidden opponent in Pokémon Card GB. His event is activated by talking to people in the Water Club and then he will randomly begin to appear in the lounge sections of the various clubs. When he is in the room, unusual music will play. When the player talks to him, he will sing music from the Pokémon anime and then entice the player to dance, finally challenging the player to a card game. He uses the Strange Lifeform Imakuni? Deck. After beating him repeatedly, he gives the player the Imakuni? Trainer card, which simply makes the user's own Pokémon confused when used.

Strange Lifeform Imakuni? Deck

• 10x Water Energy
• 16x Psychic Energy
• 4x Psyduck
• 3x Golduck
• 2x Slowpoke
• 2x Slowpoke
• 3x Slowbro
• 4x Drowzee
• 3x Hypno
• 4x Farfetch'd
• 4x Imakuni?
• 2x Maintenance
• 2x Pokémon Flute
• 1x Gambler

In Pokémon Card GB 2 on the GR Island there is a Red Imakuni? who uses Strange Deck (きみょうなデッキ).

In the TCG

Tomoaki Imakuni is a card illustrator. Imakuni? has following cards that relate to him, they are usually joke or prank cards not meant to actually be used in serious play:

• Imakuni?
• Imakuni? In Hole
• Imakuni?'s Rules
• Shining Imakuni?
• Imakuni?'s Doduo
• Imakuni?'s Whismur
• Imakuni?'s Loudred
• Imakuni?'s Exploud ex

NPCs in the GB Islands
Dr. Mason | Mr. Ishihara | Imakuni? | Tech Sam | Tech Aaron