English Official Summary

It's the third day of Professor Rowan's Pokémon Summer Academy, and he's sent the campers to observe Water-type Pokémon living in a nearby lake. There are just two main rules: no catching Pokémon, and no leaving the area! As the Trainers begin searching for Water-type Pokémon, Pikachu sees a flash of light and spaces out for a moment, but quickly recovers. Ash and his friends continue to observe Pokémon until Angie, another Trainer on Ash's team, notices that her Shinx is missing. And Piplup falls into a brief trance after it sees the same flashing light as Pikachu! Conway thinks this is related to the legend of the lake, which says that Pokémon vanish when the blue light flashes. Ash and his friends search for the source of the light, and they eventually stumble into a cave with an eerie green glow. At the back of the cave, Angie's Shinx is standing by a glowing pool of water, and the glow is coming from the fins of a Lumineon. As our heroes wonder what an ocean-dwelling Pokémon is doing in this cave, Jessie—now pretending to be another Summer Academy camper—barges in and declares she's going to catch Lumineon. Of course, that's against Professor Rowan's rules, so Conway uses Slowking to drive away Jessie and her Yanmega. All the commotion frightens off Lumineon, but Ash and Buizel dive into the water and spot an underwater tunnel. That must be where Lumineon went—the tunnel lets it swim from the ocean to the cave, where there's lots of seaweed to eat. The flashing lights on its fins hypnotize the "vanishing" Pokémon, too! Professor Rowan is pleased to hear our heroes' discovery, but he also deducts points from everyone who broke his rules by entering the cave. It looks like Ash and his team will have to make up some points if they want to win at the Summer Academy!

French Official Summary

À l'Académie d’Été Pokémon, nos héros travaillent sur un rapport sur les Pokémon de type Eau dans un lac proche, quand un mystère se fait jour.

German Official Summary

Am dritten Tag von Professor Eibes Pokémon-Sommer-Akademie gilt es, Wasser-Pokémon in einem nahegelegenen See zu beobachten. Doch plötzlich geschieht etwas Mysteriöses am See.

Italian Official Summary

È il terzo giorno dell'Accademia Estiva Pokémon del Prof. Rowan, il quale ha inviato gli iscritti a osservare i Pokémon di tipo Acqua che vivono in un lago vicino.

Portuguese Official Summary

Na Academia de Verão Pokémon, nossos heróis trabalham num relatório sobre os Pokémon tipo-água em um lago próximo quando um mistério começa a desenrolar!

Finnish Official Summary

Pokémon-kesäleirillä sankarimme kirjoittavat esitelmää läheisen järven Vesityypin Pokémoneista, kun he törmäävät mysteerin!

Spanish Latin America Official Summary

En la Academia Pokémon de Verano, nuestros héroes están trabajando en un reporte sobre los Pokémon tipo Agua en un lago cercano cuando un misterio comienza a develarse.

Spanish Official Summary

Es el tercer día del Campamento Pokémon del Profesor Serbal, y ha enviado a los campistas a observar los Pokémon de tipo Agua que viven en un lago cercano.

English Great Britian Official Summary

It's the third day of Professor Rowan's Pokémon Summer Academy, and he's sent the campers to observe Water-type Pokémon living in a nearby lake. There are just two main rules: no catching Pokémon, and no leaving the area! As the Trainers begin searching for Water-type Pokémon, Pikachu sees a flash of light and spaces out for a moment, but quickly recovers. Ash and his friends continue to observe Pokémon until Angie, another Trainer on Ash's team, notices that her Shinx is missing. And Piplup falls into a brief trance after it sees the same flashing light as Pikachu! Conway thinks this is related to the legend of the lake, which says that Pokémon vanish when the blue light flashes. Ash and his friends search for the source of the light, and they eventually stumble into a cave with an eerie green glow. At the back of the cave, Angie's Shinx is standing by a glowing pool of water, and the glow is coming from the fins of a Lumineon. As our heroes wonder what an ocean-dwelling Pokémon is doing in this cave, Jessie—now pretending to be another Summer Academy camper—barges in and declares she's going to catch Lumineon. Of course, that's against Professor Rowan's rules, so Conway uses Slowking to drive away Jessie and her Yanmega. All the commotion frightens off Lumineon, but Ash and Buizel dive into the water and spot an underwater tunnel. That must be where Lumineon went—the tunnel lets it swim from the ocean to the cave, where there's lots of seaweed to eat. The flashing lights on its fins hypnotize the "vanishing" Pokémon, too! Professor Rowan is pleased to hear our heroes' discovery, but he also deducts points from everyone who broke his rules by entering the cave. It looks like Ash and his team will have to make up some points if they want to win at the Summer Academy!

Russian Official Summary

Идёт третий день летней академии профессора Роуана; он послал жителей лагеря понаблюдать за водными покемонами, живущими в близлежащем озере.

Dutch Official Summary

Dit is de derde dag van de Pokémon Summer Academy van professor Rowan en hij heeft de kampeerders eropuit gestuurd om in een meer in de buurt Pokémon van het Water-type te observeren.

Norwegian Official Summary

På Pokémon Sommerskolen, jobber våre helter med en rapport om Vann-type Pokémon i en elv i nærheten, i det et mysterie begynner å åpenbare seg!

Swedish Official Summary

På Pokémon Sommarakademin jobbar våra hjältar på en rapport om de Vatten-typ Pokémon som finns i en närbelägen sjö, när ett mysterium börjar veckla ut sig!

Danish Official Summary

Vore helte er på Pokémon-sommerskole og er netop ved at lave en opgave om de Vandtype Pokémon, som lever i en nærliggende sø, da et mysterium begynder at åbenbare sig!