Can the level 100 Magikarp in platinum evolve?
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!