Double-Time Battle Training! (Japanese: ダブルバトル！マンムーとヒノアラシ！！Double Battle! Mammoo and Hinoarashi!!) is the 155th episode of the Diamond & Pearl series, and the 621st episode of the Pokémon anime. It first aired in Japan on December 10, 2009 and in the United States on May 1, 2010.
Before arriving at Daybreak Town and Dawn’s next Pokémon Contest, our heroes stop by the Brussel Town Pokémon Contest already in progress. At the contest, Zoey wins her fifth Ribbon, which allows her to compete in the Grand Festival! After a big party that their old friend Candice throws in Zoey’s honor, Dawn decides she needs to come up with a new move to use in the upcoming Double Battle round of her next Contest. Frustration soon sets in, as she can’t seem to get the inspiration to come up with a fresh idea. And that’s when her friend—and rival—Zoey offers to help. With the rest of our heroes cheering them on, as well as some additional help from the Snowpoint Gym Leader Candice, Dawn does some creative visualization and comes up with an ingenious Fire- and Ice-type combination move, which she dubs “Flame Ice.” The move appears to be working perfectly...until it sputters out right before it is able to make contact with Zoey’s Leafeon and Kirlia. Not to be discouraged, Dawn promises to have the move down pat before her next Contest. Our heroes bid goodbye to their friends as they confidently set out toward Dawn’s next Contest, as well as Ash’s next Gym Battle.
Meanwhile, Team Rocket is disguised as they walk out of the Contest Hall. Jessie is angered due to her loss. They notice the twerps talking to Candice and hide in a bush. Then Zoey shows up and thanks them for their cheering. Candice suggests about throwing a party to celebrate Zoey's victory. Thus, the scene turns to a table full of sweets. As they eat, Dawn informs Zoey on her intentions to participate in the Daybreak Contest. Zoey in turn, informs her that it will be a Double Performance event. As she is saying this, Ash's mouth burns up and he demands water, whereupon Candice tells him that her Tamato Berry bars are simultaneously sweet and spicy.
Dawn decides to prepare for the required Double Performance, hoping to avoid the mistakes that led to her early exit from the HearthomeContest. Their party continues and the scene turns to them in their rooms with Zoey entering in. She finds out from Ash and Brock that Dawn left to prepare alone for her Contest. Zoey then goes out and sees Dawn training with her Piplup, Buneary and Pachirisu. She orders Piplup to use Bubble Beam while Buneary uses Ice Beam in order to blow them.
Then, she orders Piplup to use Whirlpool while Pachirisu uses Discharge on it resulting in a flashy performance. After that, Zoey shows up and congratulates her. Dawn tells her about her intentions to try to find a new combination, to which Zoey suggests working together on a new combination tomorrow. Night turns day and the scene turns to Ash who has just woken up. He then sees on TVRhonda interviewing Paul in front of the Canalave Gym. Brock shows up and Paul reveals he just won his eighth GymBadge, which means that he is qualified to compete in Sinnoh's League Conference. After that, Candice enters the room and tells them about Dawn and Zoey training.
Later, Dawn informs Zoey about a new combination she thought of. Zoey suggests Dawn telling Mamoswine to use Ice Shard on a nearby rock and Dawn complies. Then she tries another combination, putting Piplup to use Bubble Beam and Mamoswine to use Ice Shard again. This time things don't go to well, as Mamoswine accidentally freezes Piplup. Nevertheless, Pikachu uses its tail to break the ice releasing Piplup.
From a nearby bush, Team Rocket come with their heads out spying on the training. Meanwhile, after their failed combination, Zoey suggests on trying something else. Candice sends her Abomasnow out to show Dawn a variation of Ice Shard. Abomasnow uses Ice Shard followed by Razor Leaf which breaks the Ice Shard in small pieces and spins around Candice. Dawn upon seeing this proceeds into trying the same combination. She orders Mamoswine to break the Ice Shard with its tusk and to send it spinning around Pachirisu. Then Pachirisu uses Discharge on the ice pieces to electrify them resulting in another flashy performance.
After that, she orders Pachirisu to smash the nearby rocks. While it proceeds into doing so, it is stopped by the electrified ice which surrounds it. It tries to use its electric attack but due to the long distance it fails. To make matters worse, the ice stops spinning and falls on Pachirisu. Dawn then reacts disappointed but Zoey calms her.
Next, Zoey suggests having a Double Battle against her. Dawn agrees and uses her Cyndaquil and Mamoswine while Zoey sends her brand-new Pokémon, a Leafeon and a Kirlia. Mamoswine starts by using the same technique it did before with Pachirisu. As the ice spins around Cyndaquil, it uses Flame Wheel to spin along it melting it in the process. Steam rises from the previous combination and the resulted water from the melted ice pours over Cyndaquil extinguishing its flame.
After that, Candice suggests Dawn to visualize the moves. Dawn then starts to remember the Tamato Berry bars that Candice made and realizes she can make opposites interact! Then she orders Cyndaquil to turn into a Flame Wheel and Mamoswine to do the same technique it did before. Then she orders Mamoswine to shot another Ice Shard at the spinning ice, freezing Cyndaquil in it while it continues to spin in a Flame Wheel. Dawn names her new combination 'Flame Ice'. Then, Cyndaquil proceeds in attacking Zoey's Pokémon by charging to them using Flame Wheel while still inside the ice. As it approaches them, the ice breaks and Kirlia along with Leafeon dodge the attack.
Zoey's reply comes by ordering Kirlia and Leafeon to use Magical Leaf. Next, Kirlia uses Psychic to direct the leaves towards Mamoswine and Cyndaquil knocking both of them in the process. Candice stops the battle and the scene turns to Team Rocket. Jessie has tears in her eyes and turns around and leaves. James and Meowth stop her and she tells them she couldn't sabotage the twerps' training. She says that she knows now how to make double moves and sends Yanmega. Yanmega uses Silver Wind and Jessie calls Wobbuffet out to use Mirror Coat. The combination turns out worse as the reflected Silver Wind hits them and sends them blasting off.
On the official Pokémon website, the summary of this episode is incorrectly stated as "Can watching Zoey give Misty the inspiration she needs to win her next Contest?" when it should say Dawn instead of Misty.
When Zoey sends out Leafeon and Kirlia, Dawn says "You got a new Pokémon" when she really had two new additions to her roster.