Blue (P.W.T.), PokéFanon
Blue (Pokémon Trainer), Nintendo
Roughneck (Trainer class) - Bulbapedia, the community-driven Pokémon encyclopedia
Blue (Origins) - Bulbapedia, the community-driven Pokémon encyclopedia
blue alternate uniform Pokemon, Pokemon adventures manga, Pokemon trainer
Blue's Trainer Spotlight in Pokémon Masters, Pokémon Adventures, the Pokémon TCG, and More
Roughneck (Trainer class) - Bulbapedia, the community-driven Pokémon encyclopedia
Pokémon Let's Go, Pikachu & Let's Go, Eevee - Trainer Blue
Blue trainer and Articuno, Wiki
Blue (Generations), Pokémon Wiki