This is art so it has no instructions, but here is a guide to evolving a Magicarp into a Gyrados. 1: Catch a Magicarp, they are everywhere and have only one move (which doesn't do any damage). 2: Make your Magicarp participate in rotation or double battles, or give it an Exp. share. 3: Level it up to 21-30 (it depends on which game it is). 4: Watch it evolve. 5: Pet your Gyrados till it bites your head off.
This is Magicarp from Pokémon. Actually, most are ugly, while this one is not. Made with SAI trial version. You can actually do a lot with the trail.