I want a darmatian but I don't know where to get a rage candy bar off of the professor.
After you beat the elite four, go back to Relic Castle and go in. Right when you go in the Prof. will come out and give it to you. Then go up to one of the "statues" and press A. Then say yes and you will go into battle.
Hope this helps =)
When you beat the league and visit relic castle again