Swampert

Swampert's entire competitive case in Champions rests on its Mega: Swift Swim doubles its Speed in rain, flipping it from a slow tank into a premier rain sweeper. Water/Ground has a single weakness to Grass and an Electric immunity, backed by a durable 100/90/90 bulk spread. As Mega Swampert it is the most reliable offensive core for rain teams in singles, and it can also serve as a physical Ground pivot even without Mega.

Playstyle：The standard gameplan is to bring a rain setter (Pelipper) to activate Swift Swim, then let Mega Swampert sweep with Waterfall / Earthquake / Ice Punch. Under rain, almost nothing outspeeds it. Without Mega, it can run a bulky pivot set using Surf, Earthquake, and Ice Punch to cover its Grass weakness. Team support must be ready to intercept Grass-type moves, particularly Leaf Blade, which threatens an OHKO.

✅ Favorable matchups4

Excadrill-MegaIncineroarArcanineMetagross

⚠️ Unfavorable matchups3

SerperiorVenusaur-MegaTsareena

Mega Swampert fits naturally in doubles rain archetypes alongside Pelipper. Swift Swim Speed doubling lets it move first on most turns, and Earthquake's spread damage pairs well with a Flying or Levitate partner. The Electric immunity is a concrete advantage in a field full of Rotom variants. Ground-type partners must be avoided to prevent friendly-fire Earthquakes.

Playstyle：The core pairing is Pelipper + Mega Swampert: Pelipper's Drizzle sets rain on switch-in, Swampert sweeps under Swift Swim using Earthquake to hit both opponents. Use a Flying or Levitate partner on the same side to avoid Earthquake friendly fire. If a Grass threat appears, pivot Pelipper in to absorb a hit while Swampert repositions. The goal is to maximize damage output within the 3–4 turns rain is reliably active.

✅ Favorable matchups3

PelipperExcadrill-MegaRotom-Heat

⚠️ Unfavorable matchups2

Venusaur-MegaTsareena