I wish this was real! However, it is not because
a. Children can not be mummified
b. The imaginary friend looks like he has a beer in his hand.
c. The imaginary friend seems to be drawn and not computer-animated in my opinion (no offense)!
d. The only mummy hybrid is a mummy-ghost hybrid. I understand that the sims 3 is trying to be more realistic, but come on! In sims 2, there is a werewolf-servo hybrid which seems pretty unrealistic in my opinion.
Anyways, I wish this was real.