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AG024 : A Corphish Out of Water
Advanced Generation series
AG026 : Turning Over a Nuzleaf
A Mudkip Mission
AG025   EP299
Secret Pond! Full of Mizugorou!?
First broadcast
Japan May 15, 2003
United States March 13, 2004
English themes
Opening I Wanna Be A Hero
Japanese themes
Opening アドバンス・アドベンチャー
Ending ポルカ・オ・ドルカ
Animation Team Ota
Screenplay 武上純希 Junki Takegami
Storyboard 秦義人 Yoshito Hata
Assistant director 秦義人 Yoshito Hata
Animation director 宍戸久美子 Kumiko Shishido
Additional credits

A Mudkip Mission (Japanese: 秘密の池!ミズゴロウがいっぱい!? Secret Pond! Full of Mizugorou!?) is the 25th episode of the Advanced Generation series, and the 299th episode of the Pokémon anime. It was first broadcast in Japan on May 15, 2003 and in the United States on March 13, 2004.

201 Spoiler warning: this article may contain major plot or ending details. 201


Ash and his friends are walking along a river. May uses her fingers to form a camera position, talking to the "audience" as if she was on a nature TV show. As they continue to walk, they came to a waterfall. Faced with a hard climb up the mountain, Brock sends out his Lotad. He ties a stone to a rope and throws it up into the air and then, Lotad uses Water Gun to propel it up to catch on a tree branch at the top. After checking the rope to make sure it’s secure, Brock climbs up first and the gang follows behind. When Brock reaches the top, May helps Brock, Ash, and Max up the cliff. Ash asks how May beat them and she says she used her Silcoon to glide up, where Max remarks if she were a real reporter she wouldn't give away her secret.

Ash notices a foggy lake when Max checks his PokéNav he finds that the lake surrounds a small island. They decide to go there. Brock warns them that the ground will be muddy ahead. They step out of the fog and see lots of baby Mudkip playing in the lake. Ash scans them with his Pokédex. May remembers an incident where a Mudkip used Water Gun on her. May rushes up while saying that she will catch one, but a bigger Mudkip came out of the bushes and uses Water Gun to keep her away. May bemoans her luck with Water Pokémon.

Just then, one of the baby Mudkip falls into the lake and is washed away by the current. Everyone notices its plight and Brock quickly orders his Lotad to save it. Lotad jumps into the water and reaches the Mudkip, but the current is too strong for him and pulls him along too. Brock calls for it as the big Mudkip jumps into the water. It pulls Lotad and the baby back to the shore and Brock thanks it. The Mudkip leaps back with an angry look. Brock tells the Mudkip that May means no harm. The others approach but the Mudkip runs away. Brock picks up the baby Mudkip and plays with it. An old man with a Mudkip's fin-like hairstyle, pops up, scolding them for what they are doing with the Mudkip. Ash says that they mean no harm and told the man that Brock is the one who saved the Mudkip.

They go back to the Old Man's house, whose real name is Old Man Swamp, where they are allowed to see the Mudkip Eggs that the man is raising to go be starter Pokémon for Trainers starting their journeys in the Hoenn region. He expresses worry about the larger protective Mudkip due to the fact that it is too old and boisterous for a new Trainer and that soon it will be left alone when its friends go off to start their own Pokémon journeys with new Trainers.

However Team Rocket have been secretly spying on the group and make their move to try to steal the rare Mudkip with another of their mechas by breaking down the dam and letting the water flood the river. Brock sends out his Forretress to keep the water at bay while he takes the Mudkip to higher ground. Team Rocket then come with their robots and scoop up all the Mudkip in a big bag. Brock has a flashback of him saying how soft the ground is, and tells the Mudkip to use Water Gun, sinking the robot and rescuing the Mudkip.

Old Man Swamp thanks them for saving the Mudkip and asks Brock to take Mudkip with him, to which Brock accepts and the group walks off to the next town.

Major events

For a list of all major events in the anime, please see the timeline of events.


Pokémon debuts




Who's That Pokémon?

Who’s That Pokémon?: Pelipper


The famous scene used in YouTube videos.
  • The sequence following the Pokédex scan of two Mudkip on a rock has become an internet meme, spawning hundreds of YouTube videos with a sum of many millions of views.
  • This episode is featured on the Volume 10: Mudkip copy of Pokémon All-Stars.


  • In the flashback, Brock says "The ground around here is so soft". However, what he actually said at that time was, "Feels like it's pretty muddy over here".
  • When Brock is trying to save Mudkip and the baby Mudkip, Forretress disappears.
  • In May's flashback of getting attacked by a Mudkip, she says, "How'd I do?". She originally said, "That supposed to happen?"

In other languages

AG024 : A Corphish Out of Water
Advanced Generation series
AG026 : Turning Over a Nuzleaf
Project Anime logo.png This episode article is part of Project Anime, a Bulbapedia project that covers all aspects of the Pokémon anime.