The complete Pokemon RBY pokedex, part 6

Pokémon Name: Arcanine
Type: Fire
Classification: Legendary Pokemon
Pokédex Number: 059
Ability: Intimidate and Flash Fire
Dream World ability: Justified
Useful Attacks: Extremespeed
Location Found:
D/P/P/HG/SS: Evolve from Growlithe
B/W: Evolve Growlithe

This is one powerful Pokemon. Even its classification, which is Legendary by the way, screams potential. Its stats are on par with any of the Fire starters and it's even suggested that he was originally going to be a Legendary Pokemon, replacing Moltres in the original Red game. The only downside here is that most of the moves come from Growlithe, as Arcanine only learns Extremespeed on his own.

Evolution: From Growlithe via Fire Stone