Gyarados do not evolve.
Magikarp evolve into Gyarados at lvl. 20
Magikarp is a weak water type Pokémon that resembles a fish. It will evolve when you level it up to level 20.
it evolves at level 36.
Lv 36.
It evolves at level fifteen and flaffy evolves at level 30 and it learns thunderpunch
It evolves at level 31
Taillow evolves at level 22.
It evolves at level 55.
Rattata evolves into Raticate at level 20.
aron evolves at level 32 laron evolves at level 40
Mareep evolves into a Flaaffy at Level 15, which then evolves into Ampharos at Level 30.
none. It evolves if it likes you.
at level 34 it evolves to dewgong