There are a bunch of pets with genetic power in the arena now and either you check their page and avoid them to not get curbstomped or you don't check their page and get curbstomped. Point being, unless you have your own GP or very powerful pet, there's no incentive to fight GP pets vs. non-GP pets. And for the people that put them up in the arena, it can be pretty frustrating to have your pet sit there and do nothing. 

So my suggestion is to have an XP bonus if you fight against a GP pet and win. You get extra rewards for winning against a Beast Temple in explorations. You get more XP for fighting higher leveled pets in general. GP pets are basically pets with the stats of a higher leveled pet. So it would make sense for them to give out more XP upon their defeat. 

Also it would be nice if there was some indication that a pet has GP in their arena entry, so people won't have to keep checking if a pet has GP. 

Support. I may be one of those throwing their GP pets into the Arena, but knowing of the difficulty, getting a bonus for success against the odds is only fair.

Support.

Support. It shouldn't be hard to put in a (GP 1) next to the pet name (or two, or three if that's how high the GP level is).

support c:

Support~!

Support =)

Support! I've lost count of the times I've looked at arena pets with the intention of fighting my low level non-GP pets and had to explore or train them instead due to the complete absence of anything but GP pets.