Araquanid/Oranguru Rain Trick Room

Synergy

Pelipper sets rain automatically with Drizzle while Oranguru sets Trick Room and uses Instruct to double Araquanid's Surf in the same turn. Araquanid's Water Bubble ability doubles its Surf damage, and the Mystic Water item plus rain stacks on top, making Surf devastating even off a base 50 Special Attack. Lucario provides fast Final Gambit to remove threats and enable Araquanid to sweep, while Mega Aggron covers Sand/Tyranitar matchups with Body Press.

Win Conditions

Get Araquanid into Trick Room in the rain, then use Oranguru's Instruct to fire two Surfs per turn. Water Bubble plus Mystic Water plus rain makes Surf KO or heavily chunk nearly every threat, including resistant targets.

Lead Options

Lucario + Oranguru, Pelipper + Oranguru, Araquanid + Oranguru

Threats

Mega Venusaur (survives Surf and heals with Giga Drain), weather reset (Mega Tyranitar flips rain), sleep moves before Trick Room is set, Wide Guard users blocking Surf spread.