Jessie caught Wurmple in the episode All in a Day's Wurmple, as did May. Several episodes later, in Which Wurmple's Which?, both Wurmple were temporarily switched, but were returned to their proper Trainers by the episode's end. In the episode A Corphish Out of Water, Jessie's Wurmple evolved into Cascoon while May's evolved into Silcoon; Jessie believed hers was a Silcoon as well. Four episodes later, in Seeing is Believing!, Jessie's Cascoon evolved into Dustox, soon after May's Silcoon evolved into Beautifly. While Jessie was at first disappointed that she did not have a Beautifly, she almost immediately came to adore her new Dustox (in the Japanese version, she called it Dokucale-chan on more than one occasion). In the English dub, Jessie has called her Dustox-Dear, and when she throws her Poké Ball, she has also called it "my dear Dustox".
Dustox was also Jessie's secondary battling Pokémon. She was usually used alongside Seviper, but she had also been used alone. She appeared to be fairly powerful, but as Team Rocket are the villains, she was usually defeated.
In the episode That's Just Swellow, James used Dustox as his Pokémon in a PokéRinger competition. Dustox defeated May's Beautifly in the competition, but she eventually succumbed to a last-minute defeat when Ash's Taillow evolved into a Swellow.
Using Dustox, Jessie was finally able to win a ribbon in the Solaceon TownContest in Team Shocker!. Ever since, Dustox has been wearing Jessie's hair-ribbons that she wore in that contest, and is probably still wearing it, to remember Jessie by (see below).
In Crossing Paths, during the Dustox Crossing, Jessie tearfully told Dustox to go with the others, but, since it was loyal, she didn't want to. Jessie had to shatter Dustox's Poké Ball to let her go. Dustox then went to live with other Dustox and start a family.
A † shows that the move was used recently, unless all moves fit this case or there are fewer than five known moves.
Moves improvised
Spinning Poison Sting - It was used in A Stand-Up Sit-Down!, Dustox uses Poison Sting towards the sky and when the stings start falling down, Seviper hits them with Poison Tail making them spin very fast while heading towards the opponent.
Trivia
Dustox in love
The yellow ribbons Dustox wears in the episode she was released are similar to the ones Jessie wears when she is disguised as Jessilina when competing in Contests.
Once her Cascoon evolved into a Dustox, Jessie's team didn't change for over 250 episodes until she released Dustox, not counting temporary changes.
Dustox was release the same way some Pokémon previously released:
Ash's Butterfree, to have a relationship with a shiny from the same species and different gender.
Jessie's Arbok, which refused to abandon Jessie, so she (Jessie) forced its release, breaking the Pokéball.
Related articles
For more information on this Pokémon's species, see Wurmple, Cascoon, and Dustox.
