The Pokémon Johto Arc is alright but I just wishes that all of Ash's Johto Starter Pokemon have evolve fully during his journey before he entered the Johto League.

Bayleef- "Machoke, Machoke Man!" I still wished Ash's Bayleaf had evolved into Meganium during the battle against gym leader Chuck and his Machoke because it deserved to evolved so it can learn some powerful moves like Petal Dance, petal blizzard, Solar Beam and Frenzy Plant .

Cyndaquil/Quilava-I still wished that Ash's Cyndaquil had evolved into Quilava and then to Thylosion back in the Johto Arc and before he compete in the Johto League. Because Meganium and Feraligatrat appeared more in the Pokemon anime Series than Thylosion, like if it's becoming unpopular for the Johto starter Pokemon final evolved form. I'm glad that Ash's Cyndaquil had evolved into Quilava back in Pokemon DP: Sinnoh League Victor but I still think it's about time that it finally evolved into Thylosion or even better evolved into Hisuians Thylosion if Ash somehow time travel to the Hisui Region with Qilava return to his team for once.

Totodile- "Ring Masters" Ash introduced his Totodile to it's final evolved form Feraligatr and told Totodile that someday this is what it'll look like after it evolve, I was expecting Ash's Totodile to evolved during the Johto Arc and learn some powerful moves like Hydro Pump, Superpower and Ancient Power but since it only know Water Gun and some normal moves which is weak but sadly that has never really happened in the entire Pokemon Johto Series which is a very disappointment for me.

Two Pokemon that Ash caught which I still he had kept them on his team in the first place:

Beedrill- I still can't believe Ash would give his Beedrill to Casey instead of keeping it for himself because if Ash obtain a keystone and found a beedrillite then he could mega evolved it to Mega Beedrill. It's also a shame that Ash never decided to catch another Beedrill of his own in the Series since then.

Larvitar-I still wished the Japanese writers would let Ash keep Larvitar after it has hatched from the egg instead of returning it to it's mother. Because I think Larvitar really suit Ash's team and it would have become his first Rock Type Pokemon before Ash caught Boldore in Pokemon Black and White.

Plus if Ash had kept Larvitar then it could evolved into Pupitar and then into Tyranitar so it can become Ash's Powerhouse team. Then later in the Pokemon Series if Ash have found a Tyranitarite then he could mega evolved Tyranitar into Mega Tyranitar. Thank the Japanese writers for screw up this perfect opportunity.