Parasect is good, can catch paras here:
http://www.serebii.net/pokedex-sm/location/046.shtml#x
Evolves at level 24 and should know stun spore/spore for paralysis/sleep and can teach it false swipe as you get that TM early.
obviously a little grinding still but easier than munchlax
Also could give it an item to boost speed, crit or normal type to help