Board Thread:Pokemon Arena X- CAMP/@comment-6739670-20140227173509/@comment-6016528-20140301172835

I agree with Heatproof, since Fire-Types destroy Skarmory when it comes to weaknesses. Electric-Type may do that as well, but hey, the more resistances the better.

If you want, you can give it Filter so it doesn't take as much damage from the weaknesses, though that may be a bit absurd giving that ability only to cover two weaknesses. It makes sense on Mega Aggron because it has a lot of weaknesses. On Mega Skarmory, it would be not as great because Filter only weakens super-effective moves by 25%, whereas Heatproof weakens them by 50%. But hey, it really depends on what Skarmory usually has to deal with.