ok, ok, well, as im just a rookie you will have to particully forgive me. I failed with Venusaur, but i have pride of this set. It will kill all ghosts and psichichs (as mentioned on the analysis), since they are not packed with good fight moves (well, just to care about Hypno), see:
Sneasel:
Shadow Ball
Ice Beam
Dig
Aerial Ace
I dont have any ideas for specific natures. Sure it is a Sneasel and it will not hold up too much but the intention is to hurt before get killed. Seens to have some great problems with Skarmory but with a good speed and great Attack it can lift around a lot of pokémon. C'mon, Sage, it´s not SOOOO bad.