Xavier's Imaginary "Frenemies"

Xavier has had 2 imaginary enemies for a couple months now.  They are "two guys."  Usually the two guys are trying to "get" Xavier.  Sometimes he can't go upstairs to bed because the "two guys" might get him.  We told him that the "two guys" weren't moving to the new house, but sometimes they still show up.    We remind him that the only two guys in the new house are Xavier and Daddy.  Last night when he went to bed, he told me that he had to hide Jake and Babar (his two elephant best friends, these are not imaginary!) because the two guys might get them.  I again told him that there were no two guys in the new house.  Daddy had to tuck Xavier in again because he just didn't seem to want to go to bed last night and he told Daddy that he had to hide Jake and Babar because Daddy might try to get him - now he's being sneaky!  We'll see if the two guys have officially moved out or if they will reappear again!