Blu

Blu is a Blastoise that was first introduced in Chapter 1 of ''Stun III: Alola! ''

Blu was hatched from an egg in a Pokémon Daycare in Sinnoh, when a human was breeding Squirtles and one was left behind. Mesprit found him and decided to raise him as her own. Shortly before Mesprit descended into madness, however, she gave him to Manaphy.

Mesprit promised Blu to always gift him with eternal "sweet vibes", causing him to always be relaxed. Blu has stated that he has never had an undesirable emotion in his life.

Despite not hearing from Mesprit for about ten years, he is still very loyal to her and was willing to show up at Cinnabar Island to ferry Stun to the Alola region at her request.