Send Spoink to Low.
I got the best situation possible with mine - caught it as a Grumpig. Its movepool is decent, but its typing is abysmal; pure Psychic does nothing lategame. Particularly given how much of Plasma is out and out immune to its STAB. Combine that with bad Speed and middling Special Attack - there is no compelling reason to use this thing. Having to put up with Spoink's horrific stats that late in the game would make it even worse.