As above stated, Steel/Rock/Ghost types would be absolutely necessary to defend against Donkey Kong
These are incredibly common in the meta game anyway. There is very little reason not to have at least 1 steel type on each group and ghost types are somewhat commonly carried as spin blockers. --- Jaricko - Official Venustoise of the omniverse / bacon in the fridge for all those who cry out in hunger of the Gamefaq's 3ds boards.
Wynaut maintain his stats and give him some insignificant ability (like Keen Eye)? Would even that be too powerful for a mega evo? --- I'm Sonic. Sonic the Hedgehog. 3DS FC: 0962-9436-8898 Name: Shadow the Hedgehog
Slow start would keep the lazy theme of a typical sloth as well as keep Slaking severely hindered. Unlike with gigas though Slaking gets protect and can probably stall 5 turns more reliably, it wouldn't really be worth a mega but it'd be a nice improvement for Slaking.