Well I'm not good at English.. So I'm gonna tell It in my best English...
Well it started in Russia for almost 16/17 years ago..
Well yeah.. Tala was trained from young age to be a beyblader.. He was about 6 years when his training starded.. (You can see him in season 1 When Kai get his flashback in Russia.. )
He's even been genetically enhanced to ensure victory. Well Boris putted him in some sort of Tank tingiej.. and the put wire's on him..
That were..connected whit a Computer who downloaded information from Tyson and his teammembers in Tala's head.. Well he's sort like an android..
Tala: Am not.. I will be always a human...
Yeah.. Do not disturb me when I'm typing... *kicks Tala's ass* 
Tala: HEY!! Were was that for..?! 
Brooklyn: Huh?
Well were was I..
O yeah.. we were by that android thingie... Well uuhh... Yeah.. well Later when he's about 14 he meet for the first time Tyson and his team in Russia.. and Boris is driving Kai crazy and asked him to join the Demolition Boys.. Well you can not say Tala and Kai are not really friends at that moment.. and Tala is Jalous about Kai because Boris gave him Black Dranzer.. (Yes It's that evil thing.. ) Well Kai get's out of the team because Tyson used some we-are-friends-talk to get Kai back.. and Tala takes revenge.. by dueling Tyson and the world tournament... well he acutually loses.. I think that's sad.. because he don't have any emotions and then he almost Cry's..
Well .. Later in season 3 they got Chapion-ships again.. and Kai joined the Blitzkrieg Boys because he wanted to deafeat Tyson.. No They are not friends Tala and Kai.. they hate eachother..
Well on the end Tyson deafeats Kai and he is the world champion over 3 time's.. And you can see Tala smiling on the end of the competition.. that's a scary part..
Well Uuuh... And then.. those people are back in Japan.. and there is Boris.. and he selles the BBA and make his own euh.. how do you call that?
Brooklyn: Office..
thank you.. He makes his own beyblade office named BEGA and he made a own team whit Brooklyn, Garland, Ming Ming, Crusher and Mystel.. and then Garland defeates Bryan and Spencer in a match but he did'nt had enough and want's to beat Tala to and he send Tala almost death to the hostpital..
Tala: Yeah Love You To.. 
Shut up.. *kuche* and Kai and Tyson give Boris revenge.. and blablabla.. and at the last episode we see Tala who give's Wolborgs powers to Tyson his blade.. and well that was it?
Brooklyn: and they life happely ever after.. 