After being thrown overboard by Team Rocket, Ash, Misty and Brock notice something swimming under them as they are rescued by Professor Elm.
Ash and friends discover an island on which the Pidgey population-long protected by environmental regulation and free from predators-has grown to unusually stout proportions and virtually abandoned any desire for flight. There Ash and friends find one Pidgey, however, in which the desire to soar through the heavens burns more fiercely than even in Pidgey from beyond this island. Anxious to see this Pidgey achieve its dreams, the young trainers join with the Pidgey's trainer and follow the Pokémon in a jet-assisted hot air balloon, tracking its flight as the Pidgey climbs higher into the stratosphere than any Pokémon in history.
On their way to the Whirl Cup competition, Ash and friends are fortunate enough to pass a small mountain village just as an annual Chinchou migration is about to occur. Long ago seismological forces had combined to lift the mountain out of the depths of the sea, bringing along with it the undersea nesting ground of these Chinchou.
A group of Corsola that have helped build an island have been scared off by another Corsola threatening the island.
A treasure hunter is searching for the treasure that her great-grandmother discovered under the sea.
After reaching the town where the preliminary round of the Whirl Cup is held, Ash and Misty enter and earn the two victories required to continue on to the finals. A friend they had met earlier is not as fortunate. When Misty tries to console him with promises of the next Whirl Cup to be held in three years, he remains depressed, saying that it was not lack of ability but the low spirits of his Octillery that had brought about his defeat. The Pokémon had been depressed ever since it evolved from a Remoraid and was subsequently spurned by its onetime Remoraid friends. If the boy cannot somehow mend these friendships between Pokémon that have now grown different in appearance, he doesn't see any hopes of victory even in three years time. Ash and friends willingly lend their knowledge and enthusiasm to this problem of Pokémon sociology.
As the Whirl Cup continues, Ash and Misty come across some tough opponents.
Ash and Misty each emerge victorious from arduous bouts only to be paired against one another in the next round. As these two square off, Team Rocket plots to steal the tournament's prize using reverse psychology: they leave an anonymous tip with the local police force that the prize is in danger. This tip, Jessie reasons, will lead to heightened security, which will in turn lead to overconfidence and carelessness, effectually making it easier for Jessie and James to sneak in and claim their prize. With Ash already in strong position, Misty accidentally deploys Psyduck to face his Kingler. In a surprise turn, however, Psyduck launches a Confuse attack that wins the match for Misty. Ash takes his place in the stands and cheers for Misty as she begins her next round. Meanwhile Team Rocket watches in shock as-contrary to Jessie's plan-not only is the police presence at the event fortified, but the police show no sign of growing overconfident.
A village is having trouble with a group and their Dodrio and need help.
The gang has decided to explore the rest of the remaining unseen Whirl Islands and reach a town, in which everything is shaped after the Silver Feather.
Ash, Brock and Misty have a surprise meeting with Ritchie and find a baby Lugia.
Team Rocket have captured the baby Lugia as they try to capture the mother Lugia.
Ash and the gang, along with Richie, captured by Team Rocket and held at their base. Dr. Number and the other Rockets look upon their capture of the parent Lugia, but they rather use that than the child so they carry that one off.
Missing a flight back to Olivine City, the gang finds help from a man with a not-so-safe plane.
Jasmine is now able to challenge Ash to a battle using her Magnemite and Steelix.
Professor Oak and Tracey have a problem. The Pokémon in Professor Oak's garden are acting very aggressive. Seeing the extremity in this case they call Ash for his Bulbasaur because Bulbasaur took care of and understood wild Pokémon in the past.
The group meets up with Sakura who's Espeon has evolved into Espeon as she considers her future plans.
Eugene is out to catch Suicuine but Team Rocket launches an attack on the Tin Tower.
A skateboarding competition is taking place where the winner will receive an egg and Gary is taking part.
Team Rocket try to steal Ash's egg but Togepi manages to teleport it away.
Ash's egg hatches into Phanpy as Team Rocket attempt to steal it.
Upon realizing that Ash and friends have many more Pokémon than they do, Team Rocket goes on a search for a new Pokémon. They find a Delibird in a cage, free it and capture it. A lady comes out and says that if they can prove members of Team Rocket, they can keep the Delibird. They search through Team Rocket records to find they names aren't listed. Will Jessie and James finally get a new Pokémon?
A mysterious lady falls in love with Brock as Ash and Misty have their doubts.
A Tyrogue causes trouble trying to steal food as a man tries to catch it.
A group of Xatu are worshipped by a town knowing they can predict the weather.
A group of Team Rocket members cause a Magikarp to evolve sending it on a rampage.
With Gyarados on a rampage, the group along with Lance must try and stop it.
With the business of the Red Gyarados over, Ash decides to challenge the Gym Leader Pryce but he isn't in town. They find him meditating under a waterfall. Ash battles him with Phanpy and quickly loses. Afterwards, Pryce tells the gang that his most prized Pokémon Piloswine disappeared a long time ago and he needs help finding it. The group agrees to help and they set out immediately. Jessie and James are nearby and they decide to steal it. Can Ash and the others find it before Jessie and James do?
With his Piloswine back with him, Pryce accepts Ash's gym battle.
Evolution rivalry occurs between Vileplume and Bellosom as the group have to stop it.
A giant Marcargo blocks a mountain path stopping anyone from passing.
Ash, Brock, and Misty meet up with a witch named Lily. She is seeking ingredients to conduct a spell to make humans more friendly with Pokemon. The one last ingredient she needs is tears of an Aipom, and the group fights Team Rocket to get an Aipom. Lily then conducts the spell, turning Ash into a Pikachu!
A lake with a crystal in sees an appearance by the legendary Zapdos.
In the midst of their travels, Ash and friends meet up with a young girl who, along with her two Igglybuff assistants, stars in her own musical variety television program. Our heroes are content to sit back and enjoy the show, but unfortunately Team Rocket has other plans in mind.
A mystic and her Slowpoke offer the gang the chance to enlighten their minds.
James disguises himself as Professor Oak so that they can benefit from his popularity.
A spaceship arrives on Earth but a Cleffa has gotten seperated from the group.
Misty hopes to evolve Poliwhirl into a Poliwrath when a trainer boasts about his Poliwrath.
Ash visits a local Battle park unaware that it is run by Team Rocket.
Misty's Politoed is mistaken for another Politoed used by a cheerleader.
As they continue on their journey, Ash and co go through the Ice Cave, a shortcut to Blackthorn City. But when they slip, they fall into a hole. Why is there a hole? Team Rocket, of course.
Hoping to win his final Johto badge, Ash comes across Clair and her Dratini.
Ash challenges Clair to a gym battle and has a tough time against her Dragon-types.
Ash's Charizard flies in and lands on Ash. Liza also lands in on Charla who is in love with Charizard. Rocket find a bowl in a Dragon Shrine which upsets Dragonite and causes a fire in a field. So Ash, Liza and Clair set to put out the fire to save wild Pokemon.After the fire is put out, TR is grateful that they were saved from the fire. Dragonite is under an attack rage and starts attacking Clair, Ash and the gang. This leads to a battle between Dragonair and Charizard versus Dragonite which ends his attack rage.
Using Charizard, Pikachu and Snorlax, Ash challenges Clair for his final badge.
After getting all 8 badges that he needs, Team Rocket end up stealing them.
Misty finds herself annoyed by an unofficial gym leader specialising in Water-types.
Ash finds himself reunited with his old friend Lapras near a coastal town.
The egg the group got from Professor Elm hatches into Larvitar who isn't well.
Near a hot spring, a young boy is trying to catch the legendary Entei.
A drought is causing trouble and a village hopes a Slowpoke will evolve and make it rain.
Casey is looking to catch an Elekid which evolves into Electabuzz.
Reaching the base of Mt. Silver, Ash does some training for the Johto league.
An Unown lands near the group and it uses its power to make strange things occur.
Larvitar is reunited with its mother but the poachers that caused the trouble are back.
Ash and friends offer to help the Silver Conference Officials retrieve the Ho-Oh Flame from atop a mountain shrine. However, a Sneasel and its buddies Machop and Machoke are guarding the shrine. They also meet another trainer, from the Hoenn Region, named Harrison. Harrison vows to catch the Sneasel. Will he succeed and will they get the Flame?
The Silver Conference gets underway but Ash's old rival Gary is taking part.
Ash's next opponent in the Silver Conference is Macy who develops a crush on Ash.
Ash calls on Bulbasaur for his next battle against a trainer named Jackson, who is well known for having a powerful Meganium and a Shiny Magneton.
Ash finds that his next match is up against long time rival Gary as he prepares for a tough match.
Ash's battle against Gary is only just starting but his Blastoise is a tough opponent.
Ash's match against Harrison is underway but who will win?
Our hero is at the end of a tough battle with Harrison at the Johto League Silver Conference. The winner of this battle will go on to the semi-finals. Each trainer has battled hard and is down to their last Pokémon. Ash is using Charizard. Harrison is also using a high level fire type called Blaziken. Charizard flies up with Blaziken and is in position for a powerful Seismic Toss. After the impact, however, both Pokémon are standing! As Charizard tossed Blaziken down, Blaziken had directed a Flame Thrower attack towards the ground to propel it back up, softening the blow of the impact! Both Pokémon battle well, and it seems like neither will give in, but, in the end, Charizard faints. Harrison continues on into the semi-finals, but is defeated in the next round. After his battle, he tells Ash all about Hoenn and the amazing Pokémon there. As the Silver Conference comes to a close and the gang prepares to leave for Vermillion City, Gary makes a surprising announcement - he's giving up battling. He's decided to become a Pokémon Researcher.
Back in Kanto, the group reach Viridian City as they prepare to go their seperate ways.
Ash is on his way to Hoenn with just Pikachu but Team Rocket manages to steal Pikachu.