Complex sentence: However, in "Pokémon Colosseum" it can be snagged from Mystery Troop Bluno, the trainer in blue that blocks one of the exits out of Phenac City early in the game.
Split into simpler sentences: However, in Pokémon Colosseum it can be snagged from Mystery Troop Bluno. He is the trainer in blue that blocks one of the exits out of Phenac City early in the game.