With his new Glacier Badge in tow, Ash now heads to Blackthorn City with Misty and Brock. Along the way they meet three Oddish who look like they seen better days. Turns out a group of Vileplume and Bellossom fighting war style. After running away they meet Steven who explains that the reason for this war is Branch Evolution and how Gloom can evolve into either Vileplume or Bellossom depending on which way the wind is blowing. But when a big storm hits can Ash and co. stop this war and the madness?