This is a fast airplane with a custom skin, that shows up, when you find BabyMonster flare gun.
If they can make such custom skins for planes, imagine how awesome it would be if on New Year's, instead of a regular plane, Santa Claus flew by on his sleigh and dropped airdrop with a gift skin. Wouldn't that be cool?!
The idea was there, I wonder why they didn't implement something like this