Toxel & Toxtricity
Toxel and its evolved form Toxtricity are the only Pokemon with a Poison and Electric typing, so this unusual combination is what earns them a spot on this list.
Toxel is a baby dinosaur-like Pokemon that—according to its Pokedex entry—”stores poison in an internal poison sac and secretes that poison through its skin.” So the Poison type part makes enough sense.
The reason for its Electric typing is a bit more unclear, at least until it evolves into Toxtricity. Toxel evolves into one of two forms (“Amped” and “Low Key”) and takes on the appearance of a rock star.
When you see Toxtricity strumming its air guitar, it makes more sense why it has an Electric typing, but it’s still pretty strange. Why does this purple lizard enjoy rocking out so much? Why does it have two different forms, both of which are Poison and Electric type?
It sure is unique, though I wouldn’t want to go to one of its rock concerts if there’s a chance the audience could be hit by one of its Sludge Bomb moves.