A good competitive cocancer set

[shademonkey]

Filter doesn't add much to Cocancer though. This pokemon is likely to be played with sun support 70% of the time, so that cancels the Filter neutrality to Fire-type moves and puts it back to a regular weakness. As Lord Windos said, Ice-type moves still net a kill most of the time on the crab, so do Nuclear-types btw. That leaves us only with a Bug and Flying neutrality, at the cost of not being able to use ChestoRest or boost our speed.