I remember whe I joined *ages* ago it told which moves to use based on what the opponent was using. I haven't used this site in over two years and I can't recall what these are. Is there somewhere I can find this information? I've looked and can't seem to locate it.

I think it depends what genes your pet has - the Spurs are for Blow, I think, Sharp Feathers for Rush, the elemental attacks use Bite...

Unless you mean which defenses the opponent will use to a specific attack in the arena, if you hover over a bite, blow or rush button I think the corresponding defense button of the opponent will highlight in green.