Pincurchin @ Terrain Extender
Ability: Electric Surge
EVs: 252 HP / 252 Def / 4 SpD
IVs: 0 Atk
This Pincurchin is supposed to set Electric Terrain for teammates like Alolan Raichu that need it. Terrain Extender prolongs Electric Terrain, and the Bold Nature boosts its Defense while lowering the unnecessary Attack stat.
Both Spikes and Toxic Spikes are used to soften up opponents so your teammates can take them down more easily. Recover helps Pincurchin stick around, which is good if Electric Terrain ever needs to be set back up after it fades. Rising Voltage is a nice Special move that's even better in Electric Terrain.
The 0 Attack IVs minimize Foul Play and Confusion damage. The EV spread helps make Pincurchin bulkier, an important factor in its longevity on the field.