Blue Oak (Pokemon Myth)

Blue Oak is the former champion of the Kanto region. He is also the father of Gary Oak.

Pokemon
Eevee (Item: Eevium Z)

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

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

Scyther > Scizor

Nidoran > Nidorino > Nidoking

Eggsecute > Exeggutor

Mewtwo > Mega Mewtwo Y (Item: Mewtwonite Y)