Magikarp
The Fish Pokémon
Type: Water
Official Registration #: 129
Entry: Harmless.Update:
Entry: Mostly harmless.Gyarados
The Atrocious Pokémon
Type: Water/Flying
Official Registration #: 130
Entry: The evolved form of magikarp, by battle experience. Twenty-one-foot-long sea serpent that consists of about 95% teeth and rage. Exercise extreme caution when engaging with this pokémon. Chances are incredibly good that it either hates you or, worse, likes you and would like to show affection with its three rows of foot-long teeth.
Mega Gyarados
The Atrocious Pokémon
Type: Water/Dark
Official Registration #: 130+
Entry: The advanced form of gyarados, via gyaradosite. Twenty-one-foot-long, 675+-pound sea serpent that consists of about 99% teeth and rage, plus a new affinity for the dark type and a power boost that together blind it to everything but its insatiable need to burn everything around it to the ground.
In other words, somewhat harmless.