Jellicent @ Waterium Z / Ghostium Z / Life Orb
Ability: Water Absorb
EVs: 252 HP / 4 Def / 252 SpA
Quiet Nature
IVs: 0 Atk / 0 Spe
- Water Spout / Hydro Pump
-
Trick Room
- Shadow Ball
- Ice Beam / Sludge Wave / Recover
Offensive trick room set, using its passable special attack and high bulk and relatively low speed when minimised.
Water spout is a high power option that is more powerful than hydro pump when you are above 73% HP, that when coupled with waterium-z allows you to still fire off a 200 BP nuke when you are at lower HP.
z-shadow ball is another option that doubles in power when the z crystal is used, and hydro pump should be used if running this instead. Life orb is another option to get higher powered moves in general.
Recover is an option in last for longevity and to power up water spout again when you predict swaps. Ice beam / sludge wave are also options however for coverage.