Looks like this guy could be really bulky w/Eviolite.
With that said,
Wailmer @ Eviolite
EVs: 196 HP/ 64 Atk/ 144 Def/ 104 SpD
Nature: Careful (+SpD, -SpA)
This guy is like a toxic-staller recovery-wall mix. He can heal off his status with rest, make him un-toxicstallable in theory, and gets EQ to take care of 'Lectric types and steels that don't get poisoned.
Proud o' myself for this one.