I think the idea is to give pokemon moves suitable for them rather than random inappropriate moves that would make them better (Ice Beam Chandelure or Sleep Powder Galvantula for example).
I like the idea of Shift Gear Golurk though, since he's supposed to be based on a Golem (actual mythological golems, not the pokemon) which would have artificial physiology, i.e clockwork.
Sleep Powder Galvantula wouldn't be weird. Tarantulas are known for kicking up clouds of irritating hairs; it's just a small step from cloud of hair to cloud of powder. --- I claim to be the official Porygon2 of the Pokemon Black 2 board. Scientist MileRun: WaRy associate