>>41739857>It's no Mega Swampert>252+ Atk Life Orb Seismitoad Liquidation vs. 252 HP / 252+ Def Clefable in Rain: 212-251 (53.8 - 63.7%) -- guaranteed 2HKO after Leftovers recovery>252+ Atk Swampert-Mega Waterfall vs. 252 HP / 252+ Def Clefable: 141-166 (35.7 - 42.1%) -- 90.4% chance to 3HKO after Leftovers recovery>252+ Atk Life Orb Seismitoad Earthquake vs. 252 HP / 252+ Def Clefable: 165-195 (41.8 - 49.4%) -- guaranteed 3HKO after Leftovers recovery>252+ Atk Swampert-Mega Earthquake vs. 252 HP / 252+ Def Clefable: 175-207 (44.4 - 52.5%) -- guaranteed 3HKO after Leftovers recoveryIt is quite literally a buffed Mega Swampert, because it way better coverage like Drain Punch, Poison Jab, and Toxic.
With base 74 speed, it can also base 100's at +1, meaning a Swift Swimming toad can revenge kill Volcarona, while Mega Swampert can't.
Yes, Mega Swampert is significantly bulkier, but you're not really thinking about bulk from a swift swimmer. You're looking at power and speed.