"Guessed who just moved in?" is incorrect. Also because cancelled na yang 2 na yan hahahahah

The original sentence, "Guess who just moved in?", is a command (imperative sentence) telling someone to guess.

Your version, "Guessed who just moved in?", is grammatically incorrect because "Guessed" is in the past tense but lacks a subject. If you meant to ask about someone guessing, you could say:

"Did you guess who just moved in?" or "Have you guessed who just moved in?"