GOD TIER:
Pokémon XD: Gale of Darkness
Pokémon Snap
Pokémon Trading Card Game
Pokémon Conquest
Pokémon Mystery Dungeon: Explorers Of Sky

GREAT TIER:
Pokémon Colosseum

Pokémon Stadium

Pokémon Stadium 2
Pokémon Rumble Blast
Pokémon Mystery Dungeon Red/Blue
Pokémon Mystery Dungeon Time/Darkness

OKAY TIER:
Pokémon Puzzle League
Pokémon Ranger games
Pokémon Pinball games

SHIT TIER:
Pokémon Dash
Pokémon Trozei
Pokémon Rumble
Poképark games
Pokémon Battle Revolution

NOT EVEN A GAME TIER:
Hey You, Pikachu!
Pokémon Channel
Learn with Pokémon: Typing Adventure