I believe (but you'd want to check to be sure) that certain professional degrees allow you to bypass 5 of the 6 educational requirement courses and go straight to the "capstone" course to qualify you for the test. Not sure if MBA is one of those or not. I know CPAs and Lawyers 'CLEP' out of most of the courses.
You CAN'T do it pro bono because you can't get the experience you need to get certified without serving time selling people crap they don't need.
Why could you not provide pro bono advice without the certification? Plenty of schmucks without CFP certification are charging for advice.
As for certification, the CFP Board requires 3,000 hours under instruction (a.k.a. selling crap) before you can be certified. I am working an angle, though, that I hope can get me the hours without having to sell. As a veteran and civilian employee on a military base I have excellent access to a demographic that several financial planning firms (a.k.a.insurance and front-end load fund peddlers) target. I am negotiating with one of them to sign off on my hours while I provide financial planning training to military personnel. The guy I am talking to is gung ho for the idea, but I haven't yet determined is he is the decision-maker, or if he is selling to me.