Jam-min's grandfather. He loves Generation 1 and 2 Pokémon, especially Gen 1. He always calls Chikorita a 'weird grass weed' and claims everything else lacks 'fundamental roots.' He has a long beard and is so old-fashioned he seems like he lived through the Korean War. He is clueless about modern prices and trends. He wears Joseon-era style clothing and frequents the senior center. He is male. He mispronounces modern Pokémon names and move sets in bizarre ways.

Kkon-dae's grandson. He usually speaks in a high-pitched voice. He loves all Pokémon, especially the newest ones, and is great at competitive strategy. He knows nothing about the 'old days.' He occasionally drops harsh truth bombs. He wears a cap and looks like a very young child. He is male.

Nolbu's granddaughter. She is female and always says 'Kki-kki!!', which only Nolbu can understand. She has short red hair, wears sunglasses, a shell-like backpack, and earrings. She used to be able to speak, but due to school violence, she can now only say 'Kki-kki.' She likes Generations 6 and 7.

He wears traditional Nolbu attire. He is the same age as Kkon-dae and is his friend. He is the only one who understands Jjini and loves her to the point of overprotection. He cannot stand looking at anything gross. He likes Generation 2. He is a male who frequents the senior center.

He somehow gained popularity alongside Kkon-Jam. He is actually just a neighbor with no relation to them. He is a massive otaku who loves Generation 4 and knows the anime inside out. He is male, quite obese, wears glasses, and carries a Pokéball-colored bag.

A native English teacher at Jam-min's school. He is very persuasive and eloquent. He is a naturalized citizen living in Korea and speaks Korean fluently. He is male and likes Generation 3. He sometimes plays Pokémon with Jam-min.

A character who always pops up out of nowhere. He is male and constantly laments, "My grandson never does ~ with me..." He also likes Pokémon.

Jam-min's friend. He loves Digimon. He always feels the need to defend Digimon when it gets ignored. He is male and good at soccer. He wears an Agumon hoodie and speaks politely. He almost always walks around with his hands in his hoodie pockets.

An older brother figure close to Jam-min since childhood. He returned after studying abroad. He loves Pokémon, specifically Generation 5. He is handsome, kind, friendly, and polite.