Gary Oak (Pokemon Myth)

Gary Oak is Ash's travelling companion in Pokemon Myth: Red and Blue arc and a main character.

Pokemon
Squirtle > Wartortle > Blastoise > Mega Blastoise (Item: Blastoisinite)

Eevee > Umbreon (Item: Darkinium Z)

Charmander > Charmeleon > Charizard > Mega Charizard Y (Item: Charizardite Y)

Elekid > Electabuzz > Electivire (Item: Electrium Z)

Doduo > Dodrio

Scyther > Scizor

Mewtwo > Mega Mewtwo Y (Item: Mewtwonite Y)