Well, it's my turn for POTW, and this week's POTW is....
Magnezone!
Magnezone evolves from Magneton with a level-up in Mt. Coronet. What really makes Magnezone interesting, though, is its combination of types: Steel, and Electric, plus the fact that it can learn Magnet Bomb, Magnet Rise, and Zap Cannon on its own, and has no egg moves because it's genderless. Magnezone evolved through exposure to a special magnetic field in Mt. Coronet, and one of the three units of a Magneton has grown bigger upon evolution.
