A good competitive cocancer set

[Werelynx]

I havent noticed anyone post a good cocancer set so can someone say a good one because im going to use him for competitive use. Also describe its EV spread and nature

[Lord Windos]

Well, since you asked, I can cobble together a set for you later today. I need some time to look over its stats, abilities, and movepool again to construct a decent moveset for it.

[Werelynx]

thanks a bunch and i would prefer if the ability was harvest

[Lord Windos]

Harvest? Well, that ability can easily work on a tanky, annoying set. What do you want the Pokémon to do for your team? That usually is the first question I ask when I design guides/movesets.

[Werelynx]

a tanky staller

[Werelynx]

i have a toxi shuffler, hazard setter, physical sweeper, special sweeper and a mega metalynx (just because hes my favourite pokemon)

[Lord Windos]

Alrighty then! I'll get on making your moveset...as soon as I get some sleep! Shouldn't take too long after that!

[PhantomUnderYourDesk]

Sleep well and peacefully, my dear friend, and take good care of yourself!

[shademonkey]

I'll respectfully wait until Lord Windos presents his sets first since he replied first, but I too have a few ideas for Cocancer I'd like to try.

[Lord Windos]

Well, I finally came up with a good set after an hour of thought and planning. Hope its up to standard!

Berry Pincher (Stall/Tank Set)

Synthesis/Block

Curse/Worry Seed

Earthquake

Stone Edge

Ability: Harvest

Item: Sitrus Berry/Yache Berry/Leichi Berry

Nature: Careful

EV's: 252 HP, 252 S.DEF, 4 ATK

If you are looing for a set that hogs the sunlight, or is just comfortable under a desert sirocco, feast your eyes on this set! Harvest ability to regenerate you Berry at no cost is phenominal, as it gives the beach crab much more sustainability against threats that would normally edge it out in the long run. The item you want to run for the crab depends on your priorities. Sitrus Berry provides a safeguard for Concancer, getting it out the red immedianlty jn a pinch. Combined with Synthesis and Curse, and it will be that make harder for opponents to turn this tropical crustacians into crab cakes. The Yache Berry, however, helps it tank hits against the likes of Alpico and Frothera, preventing them from outright KOing it with their STABs. Finally, the Leichi Berry, in conjuction with Synthesis, can provide multiple attack boosts for relatively little risk. The problem with the Leich Berry is that it doesn't offer anything in the way of extra HP or Super Effective protection like the other berries, and its redudent when used with Curse. Your choice in moves, in contrast, are much simplier choices to consider. Synthesis is there to have a reliable form of recovery, which works well with all the berries on offer. If you are willing to risk your crab being boiled alived, however, then you can run Block to trap certain targets while you either start buffing with Curse, or eliminate them with Edgequake. I would not recommend it, since you are pretty much forced to use a Sitrus Berry with this strategy, and you have to rely rather heavily on it reliably regenerating. Curse is your stat boosting move of, preferred over Shell Smash for its synergy with a Tank set. With a single boost, you can have a much wider margin of error dealing with the Fearsome Firey Trio (Inflagetah, Archilles, and Beliaddon), amoung other threats such as Mega Syrentide and M-Metalynx. Worry Seed can be used instead, though, if you want to cripple Pokémon heavily reliant on their abilities on the switch (Hi Nucleon and Siekameter!) giving you more momentum to work with. The last two moves are rather self explainatory. STAB Earthquake, with or without any boosts, is something not many Pokémon in the meta want to switch in willy nilly, and Stone Edge is there to cover its weaknesses, hitting Frothra, Harptera, Gyarados, Dunsereph hard enough to make them think twice in staying, less they want to feel the pinch. Overall, this set is designed to give your opponent a massive headache, as they try to slowly grind away at this puissant crustacean.

The weakness to this set are rather simple: Bulky Waters, Encartress, Frothra + Alpico, and the Fearsome Fire Trio. The first two threats can straight up wall this guy, as its not running a Grass type move to send them packing, and either Toxic the crab, putting it on the timer, or set up themselves. Frothra and Alpico are both fast and powerful threats, and are quite capable of OHKOing Cocancer if its not holding a Yache Berry. They still have to fear EdgeQuake, but they have at least a 50/50 chance of putting this crab on ice. The FFT are quite capable of roasting this crustacean alive, especially Archilles, as Drought Fire Blast is something to really be feared. A good CurseQuake will put them out, but its getting the opportunity is the hard part. Two other notable concerns are Dunsereph and Sableyes. The former can Paraflitch you to death quite easily and can tank quite a Stone Edge, and the former has Wil-lo-wisp and Knock Off to completely ruin your crab's life. It can even Magic Bounce your Worry Seed right back at you if the opponent outpredict you, giving them momentum instead of you!

Alternative Moves:

Knock Off: If you don't have someone on you team that can do this, this can replace Curse, as depriving a 'mon of their item is just as good as a status boost in my book!

Wood Hammer: You can replace Stone Edge or Earthquake with this to have a way to handle Bulky Waters and Encartress, but replacing the former makes you Ice type bait, and replacing the later gives Yatagaryu and Steel types free reign to merrily punch holes into Cocancer's shell.

Shell Smash: If you want an surprise option to startle your opponent, but this move does not gell well with Harvest or a tank set.

Stealth Rocks: You said you had a Hazard setter, but one more couldn't hurt, right?

Rock Tomb: A good deal weaker than Stone Edge, but the Speed drop will really hurt Sweepers. Giving Inflagetah and just how fast M-Archilles, though...

Explosion: Combined with some Curse boost, this will take just about everything that isn't Ghost type in the game. Problem is that you have to sack your crab when using it, making the move quite situational, but you might find some appeal in it.

There you have it, my harvest set for you! Do with it as you will~