Boris, The Blade Stops Here!
Without warning, a match is announced in town featuring Blader’s from the new BEGA League run by Boris. Tyson and his crew are skeptical of this new band of Blader’s, so they decide to go scope out the event. Once there, they find Garland and Tala going head to head all under the supervision of Boris who observes from the wings. An intense battle is played out on the stadium floor, when, it looks like Tala is about to lose, bars rise up out of the floor and keep him in the dish. As they continue to battle, Tala becomes weaker and weaker and collapses. Tyson's had enough. He yells out at Boris telling him his whole BEGA outfit is bogus and he challenges the shadowy figure to a battle. Boris accepts the challenges and at stake is the future of the BEGA and Tyson's future as a Beyblader!! Most of Tyson's friends surround him in a show of support, except one. Kai walks out of the stands and walks right by Tyson leaving him high and dry!
Aired 08/09/2003EP 36 - Boris, The Blade Stops Here!

Beyblade G Revolution
After keeping their BitBeasts out of harm's way, a new world championship tournament is announced, but the defending champions can't all be on the same team. Their friendship will be tested and tried as each Bladebreaker goes on a quest to prove why they are the best Beyblader around. Tyson, Max, Ray, Kai, and newcomer Daichi, must keep up their winning ways...even if they must face each other. But, after the tournament is over, what awaits them is an old foe, Boris, taking over the BBA and transforming it into BEGA, the Beyblade Entertainment Global Association. To save Beybladers of the entire world from BEGA's corruption, the Bladebreakers must reunite once again...
(Source: Anime News Network)