While traveling through the Yaguruma Forest towards Castelia City, Ash Ketchum
encountered a Sewaddle that attacked Pikachu with String Shot. It later attacked Ash Ketchum
as well but just as Ash Ketchum
tried to capture it with his Poké ball, it escaped. Ash Ketchum
decided that he still wanted to capture it as it showed a feisty fighting spirit which Ash Ketchum
liked. He decided to follow it into the forest.
After finding Sewaddle in the forest again, Ash Ketchum
showed Sewaddle that he was a good trainer by rescuing it from a surprise Woobat
attack. Ash Ketchum
tried to rescued it again after a Patrat
attempted to capture it but just before Ash Ketchum
showed up, Sewaddle managed to get its String Shot
stuck to a passing Shikijika
. It fell off a cliff into a raging river towards a waterfall but Ash Ketchum
went in after it. They were both rescued by Burgh's Leavanny
and Burgh's Leavanny
made a new leaf backing for Sewaddle.
Sewaddle gained Ash Ketchum
's trust and was then allowed itself to be caught in a Poké ball but as Ash Ketchum
tried to recall it after being captured, the Poké ball wouldn't work as Sewaddle was his 7th on hand Pokémon. Ash Ketchum
decided to keep his Sewaddle on his team at that time for training.
evolved into a Ash's Swadloon
during the gym battle with Burgh