New episode title(s) has/have been added to the database. Title: サトシとアイリスが絶交！？別れの１本道！！/Satoshi to Iris ga zekkō!? Wakare no ipponmichi!!. Please comment below! Thanks, your friendly PM.Net AnimeBot

After failing to get the extremely rare Pokémon 'Nokocchi', Satoshi gets into a fight with Iris over why that happened! With the words 'We can't travel together anymore', the two head separate ways...?

Summary:
Satoshi and friends arrive at Big Island, the biggest island in the Decolora Archipelago. As they walk down the highway that goes straight across the island, heading towards the opposite shore, they encounter the extremely rare 'Land Snake Pokémon' Nokocchi. The excited Satoshi immediately challenges it to a battle. The startled Nokocchi attacks with Screech, and Satoshi stumbles backwards, accidentally stepping on Iris' floral headdress, destroying it.

Then, while Pikachu is trying to fire off a move, Kibago crashes into it while holding its ears, and Nokocchi unfortunately escapes. Iris lashes out at Satohi, who's blaming Kibago for him failing to get Nokocchi! Satoshi's attempts at making peace with her end up backfiring, and she angrily declare 'We're through!' before marching off ahead. Dent, who has quietly watched the proceedings, end up...?

Voice cast:
Rica Matsumoto: Satoshi
Ikue Ohtani: Pikachu
Mamoru Miyano: Dent
Aoi Yuki: Iris
Minami Tsuda: Kibago
Megumi Hayashibara: Musashi
Shinichiro Miki: Kojiro
Inuko Inuyama: Nyarth
Wasabi Mizuta: Chaoboo
Misato Fukuen: Mijumaru
Akeno Watanabe: Zuruggu
Chika Fujimura: Yanappu
Kiyotaka Furushima: Nokocchi
Masayuki Kato: Parker
Unsho Ishizuka: Narration

So we have a character/relationship-building episode after a long time. I don't really understand why this didn't happen earlier. Arguing about such details after being on a journey for so long, and actually so close to the end of the whole BW... Feels somehow off.
Anyway, the episode has somehow unusual form. Some retrospective, narrative moments of Dent and also Nyaasu.
Rocket Gang used just as a shortcut for getting Iris back. Though the only interesting thing about them was "If you ask 'Pikachu?',". Rest was just.. same as usual.

So long story short: This was fortunately not a parting with Iris, just some childish argument and stubbornness.

My rating:
A fine episode which could actually mean some development of the relationship between Satoshi and Iris. If they don't forget it of course.
I give it 8