*This is continuing on from my earlier post on the Kanto and Orange Islands series.
Johto
When Ash goes to Johto, he decides to leave all but Pikachu behind, but isn't afraid to call on others when he really needs them. Robyn (still based on the lass design) leaves the group to become Ash's rival again and tutors Kris. Brock rejoins the group for a short time, some of his pokemon having evolved while away. From the start of the series, Ash tutors Jimmy until the pair go their separate ways around Ecruteak City (Ash heading for Olivine City, Jimmy for Mahogany Town). Paul is introduced in this series as a rival to both Ash and Jimmy.
Ash
Ash begins to gather more pokemon and evolves them more. He is not afraid to call on old friends when required. Because of his previous skill as a trainer, he faces more complicated battles at the gyms (eg where Jimmy battles Falkner's Gold/Silver team of Pidgey and Pidgeotto, Ash faces Pidgeot, Noctowl, Murkrow and Dodrio.)
Pikachu
Pikachu remains mostly the same. However, he forgets the move Swift in favour of Iron Tail, and holds a Light Ball.
Slowpoke > Slowking
When in Azalea Town, Ash goes to the Pokemon Centre and has Oak send over the Slowpoke he caught way back in the Kanto Safari Zone. During the investigation of Team Rocket's activities at Slowpoke Well, Slowpoke evolves into Slowking. After this, Slowking is given many opportunies to shine in battle. Moves are Psychic, Water Gun, Headbutt and Ice Punch
Dragonair > Dragonite
Ash calls on Dragonair several times throughout the series, but its most important appearance would be in order to face Clair. In order to defeat her Kingdra, it evolves to Dragonite, forgetting Slam, Thunder Wave and BubbleBeam in favour of Outrage, Thunder Punch and Hyper Beam.
Move Changes
Although they don't evolve, some of Ash's pokemon experience move changes; Charizard forgets Dragon Rage for Dragonbreath, Wartortle forgets BubbleBeam for Waterfall, Gengar forgets Nightshade for Shadow Ball, Muk forgets Sludge for Sludge Bomb, Snorlax forgets Mega Punch for Ice Punch, and Nidoking forgets Mega Punch for Thunder Punch.
Tangela fills in its two empty move slots with Giga Drain and Sleep Powder to go with Vine Whip and Bind.
New Pokemon
Heracross
Ash is forced to make the journey between Kanto and Johto on foot. This includes travelling along Route 26 and Tohjo Falls. Along the way he encounters Heracross. This is essetially the same Pokemon just caught earlier and not left at Oak's lab forever. Eventual moves are Megahorn, Endure, Rock Smash and Hyper Beam.
Aipom
Caught on Route 29, this is essentially the same Aipom as Ash catches much later in the anime. Fun loving, confirmed female, Aipom is a bit of a nuisanse whenever she appears, but is capable of holding her own in a fight. Moves include Fury Swipes, Swift, Thunder Punch and Ice Punch.
Chikorita > Bayleef
Also caught on Route 29, this is the same pokemon Ash caught in the anime. Like Aipom she is a bit of a trouble-maker (though sometimes this isn't intentional) and she's very jealous that Pikachu was Ash's first pokemon rather than her. Moves are Vine Whip, Razor Leaf, Body Slam and Sweet Scent.
Cyndaquil
Caught on Route 33, this is the same pokemon as before, and still does not evolve until a different series. However, Cyndaquil is a much more capable battler, knowing Flamethrower, Flame Wheel, Swift and Smokescreen.
Noctowl
Same Pokemon, still shiny, there is more to Noctowl this time than just flying after Team Rocket's balloon. Ash and Noctowl work hard on learning and perfecting the potentially deadly Hypnosis/Dream Eater combination after Noctowl witnesses Ash's Gengar demonstrating the technique in battle. Moves are Hypnosis, Dream Eater, Confusion and Steel Wing.
Totodile > Croconaw
Same pokemon, still caught with the Lure Ball, evolves in battle against Misty during the Whirl Cup tournament. He longs to become a Feraligatr, but doesn't quite manage it in this series. Moves are Water Gun, Slash, Bite and Headbutt.
Egg > Larvitar > Pupitar
When Ash and Bayleef win that race against Gary and his Arcanine, Ash's prize is an egg that hatches into the Larvitar from the anime that wasn't technically his. This time it is, as his first Rock pokemon. Rather than use Harden when frightened (a move error in the anime) it uses Protect. As the egg was from daycare, rather than taken from the wild, there is no reunion with its mother, and therefore Ash keeps it. Evolves to fight Team Rocket at Radio Tower. Moves are Sandstorm, Rock Slide, Dig and Protect.
Egg > Eevee > Espeon
When Ash leaves his Jolteon at Daycare with Misty's Vaporeon, something quite unexpected happens: four eggs turn up over time. One goes to Jimmy, one to Robyn, one to Kris and Ash keeps the last. After learning that Gary has evolved his Eevee to umbreon, Ash works hard to evolve his to Espeon (not quite realising that Espeon would be weak to Umbreon) Not minding the weakness, Ash uses Espeon a lot, and teaches it the moves Psychic, Morning Sun, Shadow Ball and Return
Phanpy
Rather than just give away the Beedrill he catches in the Bug Catching Contest, Ash trades it with Casey for her Phanpy. It doesn't evolve yet, but proves very powerful on its own. Essentially the same pokemon from the anime, just obtained sooner. Moves are Take Down, Rollout, Earthquake and Body Slam.
Tyrogue > Hitmontop
Ash's last addition to his Johto roster is a prize. Deep in the heart of Mt Mortar, he and uses Primeape and Heracross to take on the Dojo Master and his Hitmonlee and Hitmonchan. When Ash wins, he is given Tyrogue. The child of Hitmonchan, this Tyrogue already knows the fast and powerful move Mach Punch. Tyrogue evolves into Hitmontop halfway through Ice Path and learns Triple Kick. Final moves are Mach Punch, Triple Kick, Dig and Mud-Slap.
Misty
Misty rotates her team to suit her needs amongst her water types. There are a few changes to those she already owns, and she catches a few new ones. Following their absence during the Orange Islands journey, her former rivals
Poliwhirl > Politoed
The biggest change amongst her older pokemon comes when Poliwhirl finally evolves, but rather than Poliwrath it becomes Politoed. Becoming stronger more agile suits Politoed just fine, and Misty thinks its far better then any Poliwrath. Moves are Water Gun, Ice Punch, Body Slam and BubbleBeam
Marill > Azumarill
The only other one of her older pokemon to evolve is the Marill she caught in the Orange Islands. The power boost is welcomed, but its moves remain the same.
Move Changes
Not many move changes occur on Misty's team, but most notable are Gyrados replacing Skull Bash with Headbutt and Dragon Rage with Twister. Then Psyduck forgets Scratch in favour of Fury Swipes and Kingdra forgets BubbleBeam for Dragonbreath.
New Pokemon
During the adventure in Johto, Misty catches four new pokemon, the first being, much to her joy, and electric type.
Chinchou > Lanturn
Upon arrival in New Bark Town, Misty decides to check out the local water pokemon. After a bunch of Magikarp and Tentacool, she nearly gives up. Then she spots Chinchou. The fact that it is an electric type makes it a must-have pokemon for her and she spends the rest of the espisode trying to catch it, succeeding at the end. Chinchou later evolves into Lanturn, and proves a useful asset during the Whirl Cup... except against Quagsires... moves are Water Gun, Water Fall, Spark, and Thunderbolt.
Wooper > Quagsire
Having had several wins against other trainers of water types with her new Chinchou, Misty enters Union cave and encounters a new water type. She has Chinchou zap it, only to find that this particular water type in completely immune to electric attacks. Cue capture! Wooper is a bit more like Misty's Togepi was in the anime; prone to wandering off and getting into danger whilst Pikachu or whoever tried to save it gets hurt. A great friend of Psyduck. Evolved into Quasire during the Whirl Cup. Moves are Whirlpool, Earthquake, Slam and Ice Punch
Corsola
Essentially the same pokemon, Misty catches Corsola on Olivine Beach and becomes a favourite of hers. Moves are Spike Cannon, BubbleBeam, Recover and AncientPower.
Mantine
Misty's last capture in the Johto Arc, see falls in love with Mantine the moment she sees one and spends a long time searching for one. She gets it just before the Whirl Cup tournament. Moves are BubbleBeam, Supersonic, Take Down and Icy Wind
Brock
Having been absent for the Orange Islands saga, Brock returns to the gang for a journey in Johto. It is quickly revealed that both Graveler and Kabuto have evolved into Golem and Kabutops during his absence. Now a lot more skilled in raising pokemon, two more of his evolve early on.
Golem
Besides evolving, not much has changed with regards to this Rock type; the biggest difference being that it now knows Rock Smash
Kabutops
Unlike Golem, Kabutops' evolution gave it a much larger change in moves, with only Harden remaining. Water Gun, Absorb and Take Down have been replaces with Slash, Mega Drain and AncientPower
Golbat > Crobat
Brock evolves his Golbat in an attempt to demonstrate to Paul how happiness can affect a pokemon's strengths. Moves are Wing Attack, Supersonic, Giga Drain and Bite.
Chansey > Blissey
Still the same, caring pokemon it was back in Kanto, Brock's Chansey evolves into Blissey at the Daycare Centre, proving to the old couple there and to Suzy that he has what is takes to be a breeder. Moves remain the same.
Egg > Igglybuff
Brock's only new pokemon comes in the daycare episode. After Jessie and James try to steal the Eggs, all but one are rescued. In the end Brock saves it, just in time for it to hatch in his arms, cementing their bond. Igglybuff quickly warms up to Brock's Cubone. Moves are Pound, Charm, Sing and Dizzy Punch (after the Igglybuff that could potentially hatch from the special egg in Crystal)
Brock leaves the group in order to study pokemon breeding at the daycare, along with Suzy. He still appears on occasion, particularly when Jolteon and Vaporeon have had their eggs.
Jimmy
Based on Gold. After learning who Ash is, new trainer Jimmy asks to follow Ash for a bit, learning the ropes as they go. Ash agrees, and Jimmy accompanies the group as far as Ecruteak city, where he leaves. A subsequent side-series follows him. Becomes a rival to Ash at the league, but his main rival remains to be Paul.
Cyndaquil > Quilava > Typhlosion
Cyndaquil is Gold's starter pokemon, which he recieves from Prof. Elm on the same day that Ash comes to register for the Johto Gym challenge. Cyndaquil evolved to Quilava relatively early in order to win the gym battle against Falkner's Pidgeotto. It is still a Quilava when he and Ash part ways, but had become a Typhlosion by the time of the league. Moves are Fire Blast, Flame Wheel, Thunder Punch and Quick Attack.
Rattata > Raticate
Gold's first capture (done under Ash's supervision) is a Rattata. It proves to be a loyal and fierce battler and, as a Raticate, learns Iron Tail alongside Pikachu. Moves are Hyper Fang, Iron Tail, Headbutt and Rock Smash.
Skarmory
There is a bit of a panic on Route 45; a Skarmory as flown further south than is normal. Pikachu, Cyndaquil and Rattata take it on. Both of Jimmy's pokemon are knocked out before Pikachu can take it down. When he does, Ash gets Jimmy to catch it. Being so strong, Skarmory doesn't like Jimmy for a long time, but eventually comes around. Moves are Steel Wing, Drill Peck, Swift and Double Team.
Yanma
Jimmy catches a Yanma that cannot help but cause trouble whenever it uses SonicBoom. People often underestimate it, and it's tricky moves often get it many wins. Moves are SonicBoom, Wing Attack, Double Team and Detect
Sudowoodo
Jimmy catches the Sudowoodo that blocks the path to Ecruteak City. Its Mimic move makes it an awkward pokemon to face in battle. Moves are Mimic, Rock Slide, Low Kick and Dynamic Punch.
Stantler
Jimmy catches the baby Stantler seen in the anime where it creates illusions of its herd. It strengthens up quickly and becomes a prime battler, knowing Take Down, Hypnosis, Dream Eater and Earthquake
Gyarados
It is Jimmy, not Lance, who captures the Red Gyrarados this time, and it soon proves to be a powerful addition to his team, giving even Ash's Charizard a run for its money! Moves are Twister, Dragonbreath, Flamethrower and Waterfall
Electrode
When the group infiltrate the TR HQ under the shop in Mahogany Town, Jimmy captures one of the Electrode powering the generator. It is a good fighter, but prone to exploding with joy or excitement out of battle. Moves are Thunder, Rollout, Explosion and SonicBoom
Egg > Eevee > Umbreon
Jimmy is one of the people to get an Eevee egg from Ash's Jolteon and Misty's Vaporeon. Having seen Gary's Umbreon in action, and knowing that Ash evolved his new Eevee into Espeon, Jimmy decides to evolve his to Umbreon as well. Moves are Pursuit, Swift, Headbutt and Moonlight.
Robyn
Having travelled around the Orange Islands with Ash, Misty and Tracey, Robyn elects to become Ash's rival again, and even takes on Kris as a protegee. None of her old Pokemon evolve, though Smoochum briefly considers evolving into Jynx before deciding not to.
Move Changes
Ivysaur forgets Mega Drain for Giga Drain. Nidoqueen forgets Mega Punch for Ice Punch. Cloyster forgets BubbleBeam for Whirlpool. Hitmonchan forgts Comet Punch for Mach Punch. Smoochum learns Sweet Kiss.
Natu > Xatu
Robyn catches Natu at the Ruins of Alph. It later evolves into Xatu and becomes a core member of her team. Ash thinks its creepy, likw he does Ritchie's Mr Mime. Moves are Psychic, Nightshade, Teleport and Swift.
Snubble > Granbull
After her Clefairy befriends a wild Snubble, Robyn decides to catch it. She's a bit shocked when it evolves into Granbull, but comes to love it. Granbull is fierce in battle, and out of it. Moves are Crunch, Take Down, Fire Punch and ThunderPunch.
Sunkern > Sunflora
Robyn is never quite sure why she caught Sunkern. Upon its evolution to Sunflora, however, she has no more reservations about it. Moves are Petal Dance, Solar Beam, Giga Drain and Cut.
Egg > Eevee > Vaporeon
Another egg from the breeding of Ash's Jolteon and Misty's Vaporeon, Robyn elects to evolve hers into a Vaporeon, a perfect second water type to Cloyster. Moves are Waterfall, Shadow Ball, Ice Beam and Hydro Pump
I'll do the rest later...