Ash caught Primeape on Route 7 in the episode Primeape Goes Bananas. On the road to Celadon City, Ash learned that Gary had already caught 30 Pokémon. Upon hearing this, Ash aspired to catch more for himself. Soon afterwards, a friendly wild Mankey ate some of Brock's food. Ash took this opportunity to try to catch the Pokémon, but the Poké Ball failed, instead catching a rice ball. Mankey was angered and chased the group, beat up Ash, and stole his hat. Mankey gleefully teased Ash as the young Trainer fumed about having his beloved cap stolen.Team Rocket took this opportunity to try to capture Pikachu. Mankey came up to Team Rocket, then James kicked it out of sight. The angry Pig Monkey evolved into Primeape, punched Jessie in the face sending her face-first into a rock, then viciously attacked the Team Rocket members as well as Jessie again. After it beat up Brock, chased Ash and Misty down Route 7 and followed Ash into one of Team Rocket's pitfalls, Ash made several attempts to catch the berserking Primeape, and eventually, his Charmander was finally able to defeat it. Ash caught it and unleashed it upon Team Rocket, where it brutalized them and sent them blasting off into a nest full of wild Primeape.
It appeared in a flashback in Pokémon Scent-Sation! and was planned to be used against Erika. However Ash decided not to remembering how crazy it was.
In The Punchy Pokémon, after leaving Celadon City, Ash and his friends met a man named Anthony who was training to win the P1 Grand Prix, a tournament for Fighting-type Pokémon. Anthony's daughter, Rebecca, wanted him to stop spending so much time away from home training. Brock and Ash volunteered to enter the tournament to discourage Anthony. Ash entered Primeape. In the first match against a Machop, Ash saved Primeape from a nasty fall, which caused the usually angry Pokémon to become closer to Ash. Primeape eventually won the tournament. Anthony offered to train Primeape for Ash, with the promise of training it to become a P1 champion, so Ash left Primeape with Anthony. Primeape, unlike the other Pokémon that Ash has given to another Trainer for training, hasn't been seen since (although the narrator in the dub hinted at the end of the episode that it's possible that Primeape would return).
Primeape was only around for a few episodes, but it had a lot of personality. It was very mischievous, mercilessly vicious, extremely violent, almost always out of control, had a very short fuse and was prone to an explosive rage. This notably caused Ash to audibly reconsider using Primeape in a Gymbattle against Erika. But under the explosively violent personality, it had a softer side, which allowed it to bond with Ash.
A † shows that the move was used recently, unless all moves fit this case or there are fewer than five known moves.
In the manga
Ash's Mankey with its group in The Electric Tale of Pikachu
In The Electric Tale of Pikachu manga
Ash's Mankey debuted in Clefairy Tale and was initially part of a larger group being pursued in a forest by Ash and his Fearow. When Fearow cut them off, Ash orders a Thunder Shock from Pikachu, the Mankey panic and slam into a Beedrill nest, attacking the two groups. Later in the Pokémon Center the attendant informs him of his Grade D capture, disappointed, he wanders the street and finds a stall. Here, he trades Mankey away to the owner for a map of Mt. Moon with directions to find a Clefairy, which he later finds out is false.
Trivia
Primeape was the first of Ash's Pokémon to be left with another Trainer for training, and the only one among them that has not been reunited with Ash.
Primeape is the first of Ash's Pokémon that evolved on-screen prior to its capture.
Primeape is the first Pokémon that Ash caught in its fully evolved form.
During Pokémon Sunday on June 27, 2010, presenter Shokotan chose Primeape in her ideal team for Ash.
Among Ash's Pokémon, Primeape holds the record for the fewest on-screen appearances, appearing in only two episodes (four including flashbacks).
Related articles
For more information on this Pokémon's species, see Mankey and Primeape.