Mega Blastoise is built around a small set of moves that Mega Launcher amplifies. Water Pulse gets ×1.5 from Mega Launcher and ×1.5 from STABSTABmechanicSame-Type Attack Bonus: a move deals ×1.5 damage when its type matches one of the user's types.Click to read more →, for a 2.25× effective multiplier on base power. At 135 base Special Attack, the damage output is very high for a bulky support-capable Pokémon.
Aura Sphere is the other key move: 80 base power boosted to 120 by Mega Launcher, and it never misses. This Fighting coverage hits Rock, Steel, and Dark types — the Pokémon that would wall a pure Water attacker.
Rain team fit
On Rain teams, Water Pulse picks up an additional ×1.5 weather boost. Combined with STAB and Mega Launcher, this pushes the effective multiplier to 3.375× base power — one of the strongest Water attacks available in the format.
Role on teams
Mega Blastoise fits on Rain or bulky offense teams that need Special coverage. Its base 78 Speed is middling — it often wants TailwindTailwindmoveDoubles the Speed of every Pokémon on your side for 4 turns. Often paired with Prankster for instant priority setup.Click to read more → or Trick RoomTrick RoomstrategyFor 5 turns, slower Pokémon move first. Reverses the entire speed game — a strategy that builds teams around very slow attackers.Click to read more → support to move first against faster threats.
What stops it
- Grass and Electric moves — Both types hit Water for 2×. Venusaur’s Petal BlizzardBlizzardmove110 base power Ice-type spread move. 70% accuracy normally, but always hits in Snow weather. The signature offensive move on Snow teams.Click to read more → and Rotom-Wash’s Thunderbolt are common counters.
- Physical attackers — Blastoise’s Defense is solid (120) but its HP is only 79. Physical wallbreakers can break through.
- Speed — Without speed support, it’s outpaced by most offensive Pokémon and risks being KO’d before it can attack.