>>31311974>>31312031Let's try this:
HP: 110 / Atk: 180 / Def: 140 / SpA: 80 / SpD: 140 / Spe: 120
Ability: Iron Fist: Powers up punching moves.
It now has the ability of Primal Reversion, giving us the Regigigas that was powerful enough to shape and move the world's continents themselves.
Alternatively: Regigigium-Z: Powers up Crush Grip to be a 200 Power Z-Move: Gaia's Wrath. Regigigium-Z also has the added effect of being able to negate Regigigas's ability.
This way you can either have it be a Primal and let it romp around in Ubers, or give it an item that basically allows it to have no ability (which in this case would be an infinitely better thing), while also giving it a one time nuke.