Heading towards the White Ruins, Ash and co. come across a special Kanto Fair, a fair celebrating the region of Kanto and the various Pokemon that dwell there. Ash is excited to see all these attractions that remind him of home and ends up seeing a cheerful Charmander right on stage. Reminding him of his old friend after telling his stories to them, Ash calls Professor Oak and requests that he sends over Charizard (since he came back from Charific Valley) while he sends Unfezant to his lab. However, once there, Charizard soon meets Iris' Dragonite and a fierce rivalry between them begins with a battle. Will the battle last? Who will win?
Iris thought that Ash's Charizard was a Dragon-type because it used Dragon Tail at first until Ash's Pokedex corrects her that he's a Fire/Flying-type Pokemon.
It is also the reason why Iris couldn't have him herself since Charizard's not an actual Dragon-type at all.
All the characters in the flashbacks, except Koga, have had redesigns to fit the BW series.
Although Ash and co. (minus N) had encountered some of the Pokemons from Kanto they know in Unova. First was Koffing who was under the ownership of the Virbank City Gym Leader: Roxie in Rocking the Virbank Gym (Part 1). Second was a whole bunch of Onix they've encountered with Dawn while searching for the "Special Onix" in Expedition to Onix Island. The third was a Dragonite (when everyone called him a rogue) that Iris caught in Iris and the Rogue Dragonite.
Instead of Rachel Lillis returning, Michelle Knotz (Who voiced Misty in Mastermind of Mirage Pokémon) voices her in the flashbacks of this episode.
Although Team Rocket appears in a flashback, they are barely visible as in the scene they appear that they are being burned by Charmander's Flamethrower, leaving only their weak silhouette visible.
This is Sarah Natochenny's first time portraying Ash in the Original Series via flashbacks.
This is the first time Brock, Misty (Flashback) and Tracey (cameo), appear in the BW saga.
When it is shown Koga battling Ash, Charmander defeats Golbat with Flamethrower, when normally, it wins with Fire Spin.