eather places in time. and vegeta is well vegeta from dbz. Atem is yami yugi's real name it was reveiled in the last season where bakura was the main badguy and they were in acent eyejip and bakura sumuond a monster that defeated all 3 god monsters (slifer the sky dragon, the wing dragon of Ra, and oblisx the tormenter) at once and defeated exodia the forbidden one when exodia was fully complete