DDLC is an acyorym for Doki Doki Literature Club, which is what Sayori and Natsuki are from
Ninjago is a tv show i love for some reason
Murder Drones is an indie animation show
SSBU is a nintendo game and stands for Super Smash Bros. Ultimate
Eeveelutions are things Eevee can evovle inyo. It’s called that in the Pokemon community