Suggested by Destroyer Lucario has been compared to Goku quite a lot over the years and that’s because he is a pretty powerful fighter. He has a good degree of speed and power which will allow him to overwhelm Reshiram. Reshiram can fly but he simply can’t maneuver as quickly or as effectively as Lucario and that will prove to be a problem for him. If only he had a Mega form. Lucario wins.