I had a dream that there existed a Pokémon that had 18 evolutions.
It evolved depending on what Plate it was holding, so if it was holding a Splash Plate, it would evolve into a Water-type Pokémon, if it held a Draco Plate it would evolve into a Dragon-type Pokémon, and so on. If it didn't hold any plates it would evolve into a Normal-type Pokémon.
Such a Pokémon would be epic.
You ought to add it to the fanfic Pokédex.