In commemoration of Nintendo’s 135ᵗʰ anniversary, September 20 to 30 is NIWA Cross-Wiki Week. Click here for event details and the possibility to win a $20/€20 Nintendo eShop gift card. Please remember to follow the manual of style and code of conduct at all times. Check the Bulbagarden home page for up-to-date Pokémon news and discuss it on the forums or in the Bulbagarden Discord server.
Yamask appeared before Team Rocket in a warehouse in Battling For The Love of Bug-Types!. Meowth suggested that they capture it to increase their strength. Jessie agreed and called out her Woobat to battle it, but James claimed it was hungry and he proceeded to feed it. Once it was full, it happily went into James's Poké Ball, the trio welcoming their newest addition with enthusiasm.
However, it was kidnapped by the Candle Pokémon in an apparent attempt to lure James, Jessie and Meowth into a trap. Yamask teamed up with Jessie's Woobat, Ash's Oshawott, Ash's Pikachu, and Cilan's Dwebble to defeat the Litwick and their Lampent leader.
Yamask has since worked together with Jessie's Woobat to ambush Ash and co. or try to keep them from advancing after Team Rocket has stolen Pokémon, or use Haze or Night Shade to give Team Rocket a chance to escape.
Personality and characteristics
James's Yamask using its mask as a shield
Like many of James's Pokémon before it, Yamask is very friendly and is shown to already have a great relationship with its Trainer. It is a very thankful Pokémon as shown when it willingly entered James's Poké Ball after it was given a little food. Also, unlike most of James's other Pokémon, such as his Victreebel, Cacnea and Carnivine, Yamask doesn't show any kind of special affection to him when coming out of its Poké Ball.
A † shows that the move was used recently, unless all moves fit this case or there are fewer than five known moves.
Trivia
Yamask is the first Ghost-type Pokémon to be officially owned by a main character.
This is the first Pokémon James has added to his party since Carnivine in Two Degrees of Separation!, 212 episodes before. However, since Carnivine was actually obtained when James was still a child, this is his first capture in 259 episodes, with the capture of Mime Jr.
Related articles
For more information on this Pokémon's species, see Yamask.