I concur with the others who have suggested Big Poppa Pygmy. I think it could be one of the greatest nicknames MMA has ever had. If you go with something else at least put Big Poppa Pygmy on your walkout shirt. I think it would sell like gang busters. Also have your agent contact Simba in regards of a sponsorship. That would be rad.
This is correct. Don't get silly now, 'Big Pygmy' is solid gold from a branding perspective.
As a journalist, your story is also solid gold. Whenever you have a fight booked you should call/email the local papers a few weeks in advance and pitch your story to the sports department. Might be an easy way to get more publicity for your cause.