This is kind of a mix of Animecore and Kidcore. It's called Antique Animecore.

This aesthetic is related to childhood and older anime shows/movies from 1980-2015.

Fashion:

• Merch from older animes

• Pajamas

• Chockers/Loom necklaces

• Bucket Hats (Usually with Smiley faces)

Music:

• I'd Rather sleep - Kero Kero Bonito

• Kimi wa Dekinai ko - Kikuo

• Popipo - Hatsune Miku

• Any music from older anime