I see. Well, theoretically, it should be possible to do something similar to my chat plugins where you tell it which messages to utilise. Assuming of course the Pet Battle stuff are chat messages of a set type.
Aha, well look like there is a special Pet Battle Log.
Code:
if ( FCFManager_GetNumDedicatedFrames("PET_BATTLE_COMBAT_LOG") == 0 ) then
FCF_OpenTemporaryWindow("PET_BATTLE_COMBAT_LOG");
end
but not sure how it is utilised yet.