One for the Goomy! (Japanese: デデンネがんばる！ヌメラのために！！Do Your Best, Dedenne! Do it for Numera!!) is the 56th episode of the XY series, and the 855th episode of the Pokémon anime. It first aired in Japan on January 15, 2015 and in the United States on March 28, 2015.
When our heroes take a break on the way to Coumarine City, Team Rocket attacks! Everyone is separated in the chaos, leaving Meowth stranded with Serena and Bonnie (and Ash’s Goomy). While pretending to help, Meowth leads the group straight to Jessie and James! Serena and Pancham step up to take them on, and with the help of Bonnie and Dedenne, they’re victorious. But during the battle, Goomy gets frightened and goes off to hide.
Dedenne follows Goomy’s slimy trail through a rocky tunnel—and discovers the little Dragon-type Pokémon facing off against Team Rocket on the other side! Dedenne immediately leaps into the battle, protecting Goomy until it can no longer stand, and then Goomy finds its courage and stands up for Dedenne. Just when it looks like the two are about to fall into the villains’ clutches, our heroes show up to send Team Rocket blasting off once more. The new friendship between Dedenne and Goomy is cause for celebration, as the journey continues!
Continuing their journey to Coumarine City, Ash and his friends stop at the lake for some relaxation. They send out all of their Pokémon to join in. Ash introduces his newly caught Goomy to the other Pokémon as they all greet it. Dedenne tries to walk up to Goomy, but it hides behind as Clemont states that Dragon-type are weak against Fairy-type. Bonnie is sure that Goomy will be friends with Dedenne soon.
As everyone is having a good time by the lake, Team Rocket shows up in their balloon and releases a net catching everyone, but not Pikachu, Chespin, and Pancham. After the motto, the heroes see their foes getting away with the Pokémon. Not letting them get away, Ash tells Pikachu to use Thunderbolt, but James sends out Inkay to block with Psybeam. Clemont helps out by telling Chespin to use Pin Missile, but Jessie sends Wobbuffet to block with Mirror Coat sending the pins on the river. James tells Inkay to use Psybeam again, causing the river to move in waves. Some lily pads move, revealing Lotad and Lombre.
Annoyed, the Lotad and Lombre attack Team Rocket and send them blasting off again. While running away, Serena, Dedenne, Goomy, Pancham and Bonnie get separated from Ash, Fennekin, Pikachu and Clemont. Meowth gets separated from Jessie and James, meeting up with Bonnie and Serena. Ash sends out his Fletchinder to look for the others.
Meowth is able to trick Serena and Bonnie by acting good before being evil once more. Bonnie, however, is able to see through the ruse. Meanwhile, Pikachu and Dedenne try to use the electricity from their cheeks to try and find each other. Meowth decides to touch Dedenne's cheeks, but ends up getting electrocuted, much to the delight of Bonnie and Serena. Goomy begins to nibble on Pancham's ear and sunglasses. Pancham gets annoyed and Meowth translates Pancham's words for Bonnie and Serena.
Soon, Inkay appears and Meowth reunites with Jessie and James. Jessie is not happy with Meowth, addressing him as a "little scamp" and demanding to know where he had been. While Pumpkaboo, Pancham and Dedenne battle Team Rocket, Goomy flashes back to the destruction of its former home before sliding away. Dedenne goes down a hole to find Goomy, but it actually doesn't go down the hole, and gets spotted by Team Rocket. Jessie is unable to handle Goomy, and in the process, Fletchinder spots everyone. Ash and Clemont, along with Pikachu, Chespin and Fennekin, reunite with the rest of the gang. Serena hugs Fennekin, overjoyed to have her beloved Pokémon back.
Meanwhile, Jessie has Goomy pinned down and James is looking at its final evolved form, Goodra on his computer. Goomy tries to get away and Jessie has Pumpkaboo use Shadow Ball on it. The attack is stopped by Dedenne, who shields Goomy. Goomy, seeing Dedenne fight for it, begins to lose its fear over the Antennae Pokémon. As it had done before, Goomy uses Rain Dance on Jessie. Bunnelby defeats Pumpkaboo with Mud Shot before Ash calls for the grand finale, instructing Pikachu to use Thunderbolt. Team Rocket is sent blasting off again.
Ash and his friends then walk on to Coumarine City, with Dedenne and Goomy now being friends.
This episode contains a reference to Go West Young Meowth: when Bonnie asks Meowth how he learned to talk, Meowth is ready to tell her the story behind it, but she loses interest as soon as Meowth mentions that the story is long. A nearly identical situation happened in So You're Having a Bad Day!.
This is also reminiscent of a scene from A Hole Lotta Trouble, where Max also asked a similar question from Meowth and then proceeded to ignore his answer.
While he is sending out Inkay, James says, "Inkay, launch!" This could be a reference to Monsuno, where a character would say the name of their monster, followed by "launch".
This is the first time in the XY series that the title card is different in the dubbed version, but does not focus on Ash.
In the Italian, Dutch, German, Finnish, Swedish and Polish dubs, as well as the airing of the English dub in the UK, the title card segment focuses on Ash instead of Dedenne or Bonnie. He also reads the title instead of Bonnie in these dubs. Bonnie still reads the title in Castilian Spanish, Italian, German, Polish, Dutch, Finnish, Swedish and Brazilian Portuguese dubs.