After releasing her Arbok, Jessie saw how powerful Seviper was as it managed to beat Ash's Treecko in battle. After many failed attempts to catch the Fang Snake Pokémon, it invoked Jessie's wrath after stealing her lunch, then mocking her. After failed attempts by her Wobbuffet and Meowth, Seviper was captured after getting beaten to a pulp for "eating" her hair, which enraged Seviper as well as Jessie. Seviper replaced Arbok as Jessie's main battle Pokémon during the Hoenn and Sinnoh arcs. It has been used in many contests, but only won once, in Tonarino Town. It was often seen battling along side James' Cacnea and later his Carnivine. Similar to James' Weezing, whenever Team Rocket gets away with something they stole, Seviper uses Haze to make quick escapes. Seviper, along with Wobbuffet, was left at Team Rocket's headquarters due to the boss not wanting to attract any unwanted attention due to Seviper not being common in the Unova region. It had a strong bond with Jessie.
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