Strongest non-legendary Pokemon by region

GEN1 - Kanto
1. Dragonite
2. Arcanine
3. Gyarados + Snorlax

GEN2 - Johto
1. Tyranitar
2. Kingdra + Blissey
3. Crobat

GEN3 - Hoenn
1. Slaking
2. Salamance + Metagross
3. Milotic

GEN4 - Sinnoh
1. Garchomp
2. Togekiss
3. Electivire + Magmortar

GEN5 - Unova
1. Hydreigon
2. Archeops
3. Volcarona

GEN6 - Kalos
1. Goodra
2. Floges
3. Noivern

GEN7 - Alola
1. Kommo-o
2. Decidueye + Primarina + Incineroar
3. Dhelmise