As mentioned, Huntail, Spinarak, Scizor, and Masquerain have one head, but have MARKINGS ON THEM THAT LOOK LIKE FACES. -_- Just clearing that up. I'm not complaing; I'm poitning out where you went wrong, which I am perfectly allowed to do.
And if Spinarak goes in 'Other', so does Arbok. Snakes = teh pwnz0rz.
And what about Eggsecute? All those eggs are counted as one single Pokémon.
And Slowbro has one head, really. The swirly shell on its tail is a Shellder. Shellder is not an actual PART of Slowbro, meaning that it isn't quite the same creature. *rambling*
Anyways, I think Dugtrio is the strongest. Ground types are known for their strong attack power and good defences, and this mole's Earthquake can take out even the strongest of Pokémon.
I don't know much about Girafarig's stats, but I think it's a pretty neat Pokémon. One of the few Normal dual types whose other type isn't Flying. Its normal head is so cute and makes you just want to hug it, until you see its tail! It's both freaky and funny at the sae time.
Meh, I think I'll go with the Psychic giraffe.
~Psychic