Coulter

Coulter is a rival and friend of the player.

The player first meets him in the Celanto Library where Professor Redwood gives both of them their first Pokemon after asking them to become his research assistants. The player gets to name him whatever they choose.

He is encounter first on archan tunnel entrance asking to battle the player, and is a big part of the main story after beating marina and overhearing the new elders in cold storage