The Wii U version of the game includes Nintendo items and characters and are a blast to play with. While it's fun to summon Link and Epona, Mario and Yoshi, there's very little you can do with these iconic characters. Unfortunately, you cannot use them as solutions to any puzzle--even though there are many occasions where they would make sense. One puzzle has you coming up with someone "to go on an adventure with." Apparently Mario or Link are not acceptable; instead, the game accepted the answer "nerd."
You also can't modify the Nintendo characters, making their inclusion in the game entirely cosmetic. We understand why Nintendo would prohibit you from creating a "bi-curious dark Link," but it's disappointing nonetheless. Guess fanfic writers can keep their jobs.
Scribblenauts Unlimited's ability to render nearly anything you can imagine is still impressive, even if it does seem a little less magical now. The sandbox gameplay is further enhanced by the ability to add adjectives and edit objects. And while it's fun to simply goof around in this world, the game's puzzles do little to challenge players to explore their creativity. Coupled with lackluster Nintendo integration, this iteration of Scribblenauts provides yet another fun sandbox to play in, but doesn't feel quite "unlimited."
Nintendo characters are featured in Scribblenauts, but with huge restrictions