Lost, But not forgotten. (an Undertale Mystery)

you Have stayed in the underground for a while now. but One by one, the main bosses of the underground disappear.

can you figure out who done it before its too late...?

☜︎ 🕈︎✋︎☹︎☹︎ 💧︎☜︎☜︎ ✌︎👌︎⚐︎🕆︎❄︎ ❄︎☟︎✌︎❄︎📬︎

(WE WILL SEE ABOUT THAT. )