>>54172613Water Shuriken is miles better than Water Gun for raids, especially when it comes to energy per second (more important than DPS if your main form of damage is Hydro Cannon), so it performs slightly better overall than normal Swampert even if its stats don't compare as well. Should be noted that Water Shuriken also generates more energy per turn than Mud Shot, so while it's still not great against most opponents, it will still beat Swampert to the punch in GBL (more so in Great League than Ultra League).
