Magikarp was supposed to evolve into dragonite and dragonair was supposed to evolve into gyrados mainly because of the color scheme
Yeah, yeah... and Dunsparce evolves into Arceus when you level it up in Bill's Garden after you get Mew out from under the truck.
Arceus evolves into Dunsparce when you level it up in Bill's Garden after getting Mew out from under the truck while Arceus has all of its Contest stats maxed out, max happiness, and you have beaten the Pokémon League 493 times EXACTLY.
Anatidaephobia is the fear that somewhere, somehow, a duck is watching you, staring into your soul, using its duckiness. QUACK.
You get a Dratini in Blue. Then you trade it to Red. In Red, you evolve it to Dragonair, and trade it back to Blue. There you level it up to a Dragonite. Then trade it BACK to Red again and it'll turn into Yoshi.