Grimmsnarl

Grimmsnarl anchors the team with Prankster-boosted screens and Parting Shot, enabling the dual mega core. Light Clay extends Reflect and Light Screen to 8 turns, giving Mega Swampert and Mega Metagross extended protection to dish out damage. Calm nature maximizes its defensive role: the SP spread focuses on HP and Defense bulk so it can survive a super-effective hit that is not boosted. Parting Shot pivots Grimmsnarl out to bring in Pelipper and set rain on demand, while Foul Play punishes high-attack opponents without relying on its own weak Attack stat.