In BW092, it is revealed that Servine has evolved into Serperior and he will compete in the World Tournament Junior Cup and his first opponent was Burgundy and her Darmanitan. Serperior was quickly able to knock out Darmanitan with a Leer and SolarBeam combination.
In BW093 Serperior was seen having a battle with Manning's Heatmor and Cilan's Crustle. In its battle with Crustle, it wins with a combination of Leer, SolarBeam and Frenzy Plant.
In BW094 Serperior was seen battling Ash's Pignite. Pignite attacks with Tackle, Flamethrower and Flame Charge. Serperior lands a powerful SolarBeam and finishes it with Frenzy Plant. It was Sionara, Pignite after being hit by 2 thorns.
Serperior also has a battle against Alder's Bouffalant. After Leer, SolarBeam, and Dragon Tail, Alder's Bouffalant comes in with a finisher Head Charge.
In BW105 it battled its rival, Ash's Pikachu. After dodging Quick Attack, Iron Tail, and Electro Ball, Serperior strikes with a mirage of Dragon Tail, as well as using Energy Ball and Wrap. Serperior lost after a collision between Dragon Tail and Iron Tail/Electro Ball.