E.T. can...

...be summoned in Super Scribblenauts! If you beat every level in every constellation 50 times without losing any heath pieces, then the game lets you type "ET" in the notepad. Then, E.T. appears and uses his E.T. powers to make Maxwell (or avatar in use) go, like... very much slower than he did. Also, every iem he summons will have the adjective "Broken" no matter what so the items won't do anything and, also, makes them disinigrate after 5 or so seconds after being summoned. It's strange, but it makes E.T. so happy.