What about a Trick Room set?
Clamperl @ Deep Sea Tooth
EVs: 236 HP / 236 Sp.Atk / 36 Sp. Def
Quiet Nature (+Sp.Atk -Spe)
IVs: 2 Spe / 30 Sp.Atk / 30 Atk
move 1: Surf
move 2: Ice Beam
move 3: Hidden Power Grass
move 4: Rain Dance
This set lets Clamperl keep it's bulk and still have some power with Trick Room support. Surf is for STAB, Ice Beam hits Ferroseed and other Grass types, Hidden Power Grass hits Waters and Rain Dance powers up your Surf and makes sure weather doesnt ruin your fun.
Clamperl @ Deep Sea Tooth
EVs: 236 HP / 236 Sp.Atk / 36 Sp. Def
Quiet Nature (+Sp.Atk -Spe)
IVs: 2 Spe / 30 Sp.Atk / 30 Atk
move 1: Surf
move 2: Ice Beam
move 3: Hidden Power Grass
move 4: Rain Dance
This set lets Clamperl keep it's bulk and still have some power with Trick Room support. Surf is for STAB, Ice Beam hits Ferroseed and other Grass types, Hidden Power Grass hits Waters and Rain Dance powers up your Surf and makes sure weather doesnt ruin your fun.

