Tentacruel is great, oh how I hated the amount of Tentacruels you'd find surfing back in 2nd gen, and they all used Supersonic to annoy you even more, while not letting you flee. It has some cool abilities and tricks.
Special god / support
Tentacruel @ Leftovers
Liquid Ooze ability
252 Sp.Atk, 80 HP, 176 Sp.Def
-Sludge Wave / Venoshock
These EV's give Tentacruel the maximum special bulk while keeping Sp.Atk to the max, which when taking hits can fool your foe into thinking you're a special wall and lack direct threat. Acid Spray heavily lowers the foes Sp.Def by two stages while inflicting damage, it's a bit like a special version of Screech that also does some damage (although not much). This has an element of surprise and can cause switches. Toxic Spikes punishes foes that switch out, forcing your foe to pick between staying in with extremely low special bulk or fleeing and poisoning the teammate. Hydro Pump theoretically has slightly more damage than Surf per turn at the cost of reliability and PP, and can hit surprisingly hard at max Sp.Atk after an Acid Spray. Sludge Wave is a filler move, but it hits quite hard with STAB and covers grass types that resist Hydro Pump, while Venoshock is a more powerful option if you can keep Toxic Spikes around. Do remember that Ferrothorn walls this set like no tomorrow, as does Dry Skin Toxicroak.
I've picked Leftovers over Black Sludge simply because if someone tricks your Black Sludge, they're simply going to trick it to another pokémon in your team.
Last edited by Sceptile Leaf Blade; 16th October 2011 at 8:14 PM.
Master balls are the cheapest thing ever invented. It's more fun catching everything with balls that can fail. 'caught Latios in the wild without master ball ftw'