Unlike most Pokemon trainers, Gladion doesn’t have a typical starter Pokemon. It’s never explicitly stated in the game or anime which Pokemon was Gladion’s first. Still, it’s easy to assume that Type: Null was Gladion’s first Pokemon in the game since they have the strongest connection, and Gladion is quick to tell the player that he stole Type: Null before leaving the Aether Foundation. However, it’s hard to tell which Pokemon was his first in the anime as family portraits show him with a variety of Pokemon, but he has a particularly close relationship with Eevee, and they have been companions since Gladion was a child.