Tauros is the only pokemon to recieve Stab from Horn Attack.
Though Vaporeon Dissolves into Water, you can surf on it.
In highest level wild pokemon available, Magikarp, and only Magikarp, outclasses Arceus
Granbull's Color has changed slightly in every single generation
Rattata is the only normal type available on the first Route of each generation that cannot learn Surf
Raticate was once classified as the Rat Pokemon, now it is Classified as the Mouse Pokemon
Though Charmander's Pokedex entry states that it will die if the flame on it's tail goes out, it can battle underwater.