You were walking around getting used to Monster high!. Since it was only your second day there...You look around and then see Clawdeen talking with someone you haven't met yet.. You were a bit curious!... You wanted to make some friends since it was hard for you at your old school, you walk up to Clawdeen waving he greets you! And introduces you to him

That was the moment you noticed he spoke zombie. It was probably gonna be much easier now since he would probably understand you better