Roy is powerful, but Lucario has the power of aura. Thanks to Smash Bros, Lucario can fire off Kamehameha waves and his speed is actually greater than Roy’s. These two advantages for Lucario will be way too much for Roy to handle and the swordsman will actually be overwhelmed here. I can’t even say that it will be much of a close fight considering how powerful Lucario is, but it would still be enjoyable to see. Lucario wins.