Dr. Zagart may have some ambitious plans but he is no match for Zeo. To an extent you may feel bad for him. He has the kind of character motivation that can still be sympathetic even if you can’t abide by it since the end doesn’t justify the means. He isn’t really a fighter either so Zeo would be able to quickly crush him. For a brief time Zeo even became the most powerful Beyblader of them all even if he ended up being surpassed. Zeo wins.