All credit goes to Gribbix:
Compelling evidence. I know that the reason people doubted that SSBB would use Havok was because it was known for its own unique physics engine. What difference might this inclusion make?Gribbix said:Remember that rumor a few months ago in EGM that said SSBB uses Havok physics? A lot of people refused to believe it, but it turns out that it's true. Take a look at Havok's upcoming games page:
http://www.havok.com/content/blogcategory/37/78/