"Most Earthling humans are completely unaware of the danger they are in every time they mail a letter. This is due to the nefarious mailbox monster. It disguises itself as a mailbox and sits and waits for unsuspecting victims to walk up to it to mail a letter.
If one is patient, one can always tell a mailbox from a mailbox monster by waiting and watching it. Sooner or later, a monster will reveal itself by blinking its eyes. Other ways to identify a monster include making it dance, shooting it and, of course, walking straight up to it and hoping for the best."
— ToeJam & Earl manual, page 29.
The Mailbox Monster (Mailboxium donttrustium) is a mailbox-like mimic from the ToeJam & Earl universe.
Biology[]
They are able to disguise themselves as mailboxes, but reveal their monstrous nature when victims come too close. Their large sharp teeth suggest a carnivorous diet.