That Water Type should probably be Araquanid. If your running trick room and want a ton of damage, Araquanid.
Here are some calcs to back this up.
252+ Atk Life Orb Water Bubble Araquanid Liquidation vs. 252 HP / 0 Def Tapu Lele: 335-398 (97.3 - 115.6%) -- 81.3% chance to OHKO
252+ Atk Life...