I saw this, and then came up with a similar poke. It doesn't have the HP regeneration of Probopass, but it can be pulled off with slightly less prediction.
CLEFABLE LV 1 @ Focus Sash
Magic Guard
~Endevour
~Return
This is a set for a sandstorm/hail team. Switch in on a guaranteed stat up move, then use endeavor. The hail/sandstorm will finish the opposing pokemon off. The nice thing about Clefable is that it has Magic Guard, so it won't take damage from entry hazards, poison, burn, etc. However, this is a one-trick pony, but prediction is heavily lessened. Pick your downside. Endeavor is also a 4th gen tutor move exclusively, if I recall.
For that use Aron, it haves sturdy(focus sash), steel type for poison and sandstorm, haves ploblems with hazards but compensates in having healing with leaftovers (with can delete one hazard problem) or shell bell (which 100% heals with endevour and makes study useful again).