In Pokémon Ruby, Magikarp evolves into Gyarados at level 20. Magikarp that have been caught at a level higher than Level 20 will evolve the next time they level up as long as they're not holding an Everstone which is an item that prevents evolution.
Magikarp evolves at lv 20 into Gyarados.
(other person said that) I think that hat I remember is that with PROOF that magikarp evolves with happiness and in the manga its happiness or angriness! To check my answer, go to bulbapedia.com its the Wikipedia for Pokemon
it actually evolves into gyarados at lvl 20
Magikarp evolves at level 20. A short way to do so is to get lots of rare candies and use them on Magikarp.
level 20
Crobat doesn't evolve.
Lv20
Level 32.
Wooper will evolve at level 32.
40
Level 20.
Level 20.
Level 20
Magicarp evolves at level 20.
lvl 20 brudda
Magicarp evolves into Gyarados at level 20
Rhydon is not able to evolve in FireRed.
Electabuzz is not able to evolve in FireRed.
You evolve it at level 20
areodactl does not evolve:-)
Golduck does not evolve.
Rattata will evolve at level 20.