It would certainly be unusual, but that's not necessarily a bad thing. Depending on the role you are applying for, your creativity might be appreciated and count as a plus point. You do have to bear in mind that most of consulting work happens over powerpoint, so basically they want to assess your classical powerpoint skills as well.
Still, what I'd actually do is ask the recruiter / interviewer if they are ok with it. They have no reason to hide it, so at least you won't run the risk of providing something different than what they expect.