Serperior is already a Pokemon with great confidence since he was a Snivy and a Servine. He has little trouble dealing with opponents and he had swept through the Junior Cup. As he seldom takes opponents seriously, he only gets shocked when the opponent is stronger than him.
Like his own species, Serperior usually holds his head up when he is fighting and stays elegant all the time. Also, when Alder talked to him after he and his Trainer lost, he bowed his head and let the Champion stroke him.
Serperior first appeared, as a Snivy, in The Shadow of Zekrom!, as one of Professor Juniper's starters to be distributed to the beginner trainers in Unova. Now belonging to Trip, Snivy battled Ash's Pikachu and won due to Pikachu being unable to use any electric attacks.
Snivy appeared again in A Rival Battle for Club Champ! during Trip's second battle with Ash, where it was revealed to have evolved into a Servine. He battled Pikachu and easily defeated him with Cut, before losing to Ash's Snivy after being hit by Attract.
In Jostling for the Junior Cup!, 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 Battling Authority Once Again!, 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 Ash, Iris and Trip: Then There Were Three!, 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 Curtain Up, Unova League!, 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.
|Tackle||In the Shadow of Zekrom!|
|Leaf Tornado||In the Shadow of Zekrom!|
|Cut||A Rival Battle for Club Champ!|
|Leer||Jostling for the Junior Cup!|
|Solar Beam||Jostling for the Junior Cup!|
|Frenzy Plant +||Battling Authority Once Again!|
|Dragon Tail +||Ash, Iris and Trip: Then There Were Three!|
|Energy Ball +||Mission: Defeat Your Rival!|
|Wrap +||Mission: Defeat Your Rival!|
|+ indicates this Pokémon used this move recently.*|
- indicates this Pokémon normally can't use this move.
- Japanese: Shin-ichiro Miki (as Snivy), Kiyotaka Furushima (as Servine and Serperior).
- English: Jason Griffith.