Simply level it up to 20.
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.
Level up to level 20 if male if female you get one of the other three.
there is no good Pokemon and bad Pokemon its just the way You level it up and what moves it knows /execpt Magikarp they cant learn moves but Gyrados is worth it at the end.
If you are going to evolve a Magickarp in Pokemon Platinum you need to: 1. Go and find yourself a MagicKarp(of course if your going to evolve a MagicKarp) 2.level up that MagicKarp to lvl 20 and then it evolves.( It will learn how to use bite when it evolves). P.S I hoped this helped you!
The Pokemon magikarp evolves into gyriados at level 20 just put an exp share on the magikarp to hold and the levels will shoot up really fast
You put him as your entering Pokemon and you use splash on the opposing Pokemon, then you switch Pokemon and kill the opposing Pokemon. Repeat this alot. The Magikarp will gain experiance. -Nazi
Simply level it up to 20.
You level up by battling wild Pokemon, Trainers, and Gym Leaders.
rare candy
I say just keep battling weak pokemon or normal ones
Defeat wild Pokemon or trainers Pokemon then go to the Pokemon center and heal your Pokemon notice your Pokemon's level went up.
if your looking for a gyrados catch a magikarp and level it up at the day care till it can fight then level it up and it will evolve into a gyrados
Level it up to level 16 into Combusken then level 36 to make it into Blaziken.
In Pokemon Red, Blue, and Yellow, the only way to get a Gyarados is to find a Magikarp and level it up til level 20. I think. And in Pokemon Diamond, Pearl, and Platinum, where you battle the elite 4, where you use waterfall to get up there. You can find a gyarados in there. Gyrados is level 20. Find a level twenty or twenty one magikarp and level it up by one for Gyrados.
Yes you can! Level it up to 30 to 50th level. I've caught it!
There is no purpose for it. Pokemon wanted to make magikarp the weakest Pokemon in the world but all Pokemon still need to have at least one move so they designed splash. The move does exactly nothing exept wastes a turn. Use an exp. share on magikarp if you want to level it up.