The possible solutions are:
1. Rename the empty "Battle" chat in "Rating" chat or
2. Create a calculation system that auto-calculate a rate for your pokemon basing itself on IVs, nature and ability and shows the final vote in the pokemon card (I'd really like it, but I see it almost impossible to happen even because the different natures are useful for the different builds a pokemon can have) in order to completely avoid the requests or rating.