Rattata

Rattata (Japanese: コラッタ Koratta) is a Normal-type Pokémon introduced in Generation I.
It evolves into Raticate starting at level 20.
In Alola, Rattata has a regional variant that is Dark/Normal-type. In Pokémon Sun and Moon, Ultra Sun and Ultra Moon, it evolves into Alolan Raticate when leveled up at night starting at level 20. In Pokémon: Let's Go, Pikachu! and Let's Go, Eevee!, it evolves into Alolan Raticate starting at level 20.
It is the only possible starter Pokémon in Pokémon Rumble.Ra