This article is about an episode of the Pokémon animated series that has not been dubbed into English. As such, its coverage may contain romanized Japanese names, rather than dub names.
Spoiler warning: this article may contain major plot or ending details.
Plot
On a rooftop in Lumiose City, a little girl named Navi greets the Pokémon around her, until she notices an airship, the Brave Olivine, flying over the city, exciting her until she's called inside by an Espurr and a voice from indoors to run an errand.
The Rising Volt Tacklers have arrived in Lumiose City, with Ult insisting that he be their guide due to being born and raised in the city, but Roy, Liko, and Dot immediately get sidetracked by the glamorous sights, much to Ult's annoyance. The group subsequently heads to the Looker Bureau, where they're greeted by Emma. Emma is happy to see how much Roy and Ult have grown, while the two boys are both shocked and impressed at her new attire. She comments proudly how Roy's Crocalor has evolved into Skeledirge and how Ult's Dusk Ball has finally opened to reveal a Dragonite, shedding tears of happiness for Ult. Roy and Ult introduce Liko and Dot to Emma as they all step into the Looker Bureau. Emma offers to make them some coffee, only to remember that she had run out of coffee beans and sent her assistant to buy new ones. Ult barely has time to question who this new assistant is when Navi arrives with the coffee beans in hand and promptly gets amazed by all the Pokémon she has never seen before, until Emma reminds her to give her the beans. Emma introduces Navi to the Rising Volt Tacklers, while Navi enthusiastically introduces herself as Emma's assistant and a huge Pokémon lover, while the Rising Volt Tacklers, minus Ult, express their happiness to meet her. Everyone sits down for coffee, though Emma says that Navi is too young to drink it yet, much to her annoyance, though she's made happier when Emma agrees to pour a small drop of coffee into her mug of milk. Ult backhandedly comments on this and calls her childish in response while sipping his own coffee, but Navi retorts by saying that he is the childish one for feeling the need to even say anything, infuriating him. While everyone chows down on some Lumiose Galettes, the Rising Volt Tacklers introduce themselves to Navi in more detail, specifying how they're adventurers traveling around on the Brave Olivine. Navi gets excited at the thought of flying around on an airship and being surrounded by Pokémon, expressing her newfound hope of getting to get a ride on the airship too.
The doorbell rings as Emma gets a visitor, an old lady in need of her detective skills. She explains that her Carbink has gone missing. Emma asks for ways to identify this specific Carbink, so the old lady shows her a pendant she's wearing, saying it's a gift from her husband and shaped like the gemstone on her Carbink's chest. Later, when Emma prepares to head out to search for Carbink, the Rising Volt Tacklers express their willingness to help, which Emma agrees to, deciding to take Liko and Dot with her, since this is their first time in Lumiose. Navi, in turn, decides to accompany Roy and Ult, much to Ult's annoyance, preparing everyone a thermos of coffee and readying her personal set of detective gear. Dot notices Navi holding a Dream Ball, which she says was a gift from Emma. Ult asks what Pokémon is inside of it, but she refuses to answer, annoying Ult.
Roy, Ult, and Navi decide to search around the plazas first, though Navi is quick to suggest they should look for Carbink from the air using her telescope instead. Ult can immediately tell she just wants to have a ride on the Brave Olivine, though with Captain Pikachu approving Navi's request, they head to the airship. Elsewhere, Liko, Dot, and Emma's questioning of people doesn't provide any promising leads. Dot suggests that since Carbink is a Pokémon that lives underground, they could try searching for it from a dark, underground location, which gives Emma an idea. Meanwhile, Roy, Ult, and Navi have arrived at the Brave Olivine, introducing an ecstatic Navi to the rest of the crew, and take off. On the bridge, Navi gets briefly scared when Dittotransforms before her, causing her to accidentally spill the coffee milk in her thermos, which Ditto tastes and comes to enjoy. Noticing this, Navi graciously gives it all of her remaining coffee milk. While the airship takes off and starts circling the city, Emma's group visits some workers at Racine Construction, who, as experts of the city's layout, mention having seen a tall man carrying around a Carbink around the exit to the Sewers. Liko relays this information to the Brave Olivine, where Navi spots the man in question carrying Carbink down below, so Roy and Ult decide to head down after him, leaving the airship's wheel to Murdock. Although they tell Navi to stay behind, she still chases after them, though not without bumping into Murdock along the way and unknowingly dropping her Dream Ball in front of Ditto. Roy and Ult start flying down with Kilowattrel and Dragonite when Navi calls after them, with Dragonite, without a prompt from Ult, turns around and picks up Navi to bring her with them.
While Liko, Dot, and Emma make their way towards the others along Autumnal Avenue, Roy's group manages to catch up with the tall man in a martial arts uniform and follows him from a distance through Lumiose's alleyways while waiting for Emma's group. The man shatters a boulder on his way with a single punch and accidentally shatters his phone while attempting to make a call, intimidating Carbink and the group with his outrageous strength. Deciding to forego waiting for Emma, Roy calls out his Lucario as the group follows the man around a corner, only for him to be facing them as they reach him and reveal that he's been aware of them following him. However, his attention is quickly redirected to Roy's Lucario, excitedly referring to it by its past name of Yellow Flash and speaking of the old rumors about its strength. The man introduces himself as Ivor and issues a battle challenge to Roy. Once Ivor has agreed to return Carbink after the battle is over, Roy gladly agrees to accept the challenge.
Moving out into a more open area, Roy and Ivor prepare to begin their one-on-one battle. As the opponent for Roy's Lucario, Ivor chooses his Falinks. The moment Captain Pikachu officially starts the battle, Ivor Mega Evolves Falinks, causing it to assume a new, stacked-up battle formation, which Roy responds to by Mega Evolving Lucario into Mega Lucario Z. Falinks makes the first move with Brick Break, which Lucario manages to fend off before attacking with Metal Claw, which Falinks, in turn, blocks using its shield before using Rock Slide. Lucario manages to shatter the falling boulders with Close Combat, creating a big cloud of dust. Falinks charges through the dust cloud with Iron Head, but Lucario is able to sense and evade the incoming attack thanks to its aura sense, before counterattacking with Flash Cannon, though its attack is once again blocked by Falinks's shield. Ivor is impressed by Yellow Flash's dexterity, but still feels he has the advantage. He has Falinks power up with No Retreat and attack with a flurry of Brick Breaks, though Lucario is able to dodge or block every single blow, increasing Ivor's excitement. During the assault, Roy notices that the trooper forming Mega Falinks's midsection seems to be struggling, so when Ivor orders one more Brick Break, Roy has Lucario dodge and aim for the waist section trooper with Aerial Ace. Although the initial blow is once again blocked by Falinks's shield, Roy manages to create another opening and deal the intended blow, causing the Mega Falinks formation to fall apart. The brass and the other troopers get up and attempt to regather, only to realize that the midsection trooper has fainted, leaving the formation unable to reassemble, so Captain Pikachu rules the battle in favor of Roy. Despite losing, Ivor is happy to have gotten to battle the Yellow Flash. Roy reminds Ivor of his promise, so he gladly agrees to hand Carbink over just as Emma's group shows up, revealing to the detective that the Jewel Pokémon had been found wandering lost by his little sister, so he had taken it upon himself to return it to its Trainer. Roy's group apologizes for mistaking the situation for a kidnapping, while Ivor apologizes for not admitting the truth sooner due to having gotten excited at the sight of the Yellow Flash, before seeing them off. Both groups return to the Looker Bureau with Carbink, where the old lady is happy to be reunited with her Pokémon and thanks Emma and the children for their help.
The children decide to stay at the Looker Bureau for the night. Just as Roy has finished informing Murdock of their overnight stay, Navi becomes alarmed when she realizes she's lost her Dream Ball. In her panicked state, she admits that the ball was empty, with Ult expressing mild surprise and annoyance that she isn't even a Trainer yet. Everyone is relieved that at least no Pokémon had been lost, but Navi, on the verge of tears, desperately insists that she needs to find it, which shocks the group at how emotional she is getting over it. Emma attempts to console her by offering to simply buy her a new one, but she firmly rejects the idea of letting it go or getting a substitute, insisting that her Dream Ball is irreplaceable. Meanwhile, aboard the Brave Olivine, Ditto is revealed to have picked up Navi's Dream Ball, and becomes determined to return it to her.
This is the first episode to feature a character introduced in Pokémon Legends: Z-A.
Emma's appearance is updated to match her design in Pokémon Legends: Z-A. However, in-universe, only a year has passed since the events of Episode: Mega Evolution, and not five years like the period between Pokémon X and Y and Pokémon Legends: Z-A.
Ivor accidentally breaking his smartphone when trying to call his sister is a reference to his character in Pokémon Legends: Z-A, in which Gwynn explains that he doesn't own a Rotom Phone due to always breaking each one he touches.
When Ivor sends out his Falinks to battle, the Ultra Ball releases a yellow light instead of the traditional red, unlike its depiction in the previous series.
