You will Watch Pokemon Season 15 Black & White: Rival Destinies Episode 15 online for free episodes with HQ / high quality. Stream cartoons Pokemon Black & White: Rival Destinies Episode 15 Evolution Exchange Excitement!.Having saved the Galvantula and Joltik from Team Rocket, Bianca and Professor Juniper proceed to trade their Shelmet and Karrablast in a procedure they call trade evolution. Bianca wants to trade immediately however Professor Juniper would like to put the two in battle first. Bianca and Professor Juniper begin their battle with Cilan as the referee. Bianca calls out Shelmet, while Professor Juniper calls out Karrablast. Karrablast starts out with Peck while Shelmet uses Protect. Next is Take Down with still no effect. Suddenly, their computers crash and freeze up along with the link trade system as well. Bianca freaks out when they find out. Something strange is happening in Cave 7 so they go to investigate. They discover a bunch of Klink and procede further to the source of the mystery.