For me, the only time that I can remember Mickey Mouse being violent or scary was in the 1995 movie entitled, "Runaway Brain":
In an attempt to convince Minnie that he hasn't forgotten to buy her an anniversary present, Mickey Mouse ends up promising to take her to Hawaii. Funds being short, he applies for a job as lab assistant to the sinister Dr. Frankenollie, who happens to be searching for a donor to provide his monstrous creation with a brain....the rest of the movie involves monstrous mice running amok!
I wish Disney would have licensed out more of this kind of alternative character plot. Seeing a Count Donald Duckula or a Goofy Zombie would be amazing!
The toys come very highly-prized on my wishlist. Both the original Disney release and the Span of Sunset version really capture the grotesque-ness of Mickey.....