Butterbean, despite his novelty appeal is the most legit and experienced fighter of the bunch. Unfortunately, he's only a couple years away from 50 - so in reality, I would put my money on Kimbo, due to his size and age advantage.
As an aside on Kimbo Slice. He is scheduled to fight a 4 round boxing bout in Australia in January, and the promoters are looking for a local to face Kimbo and are asking for videos of potential opponents sparring, and a brief summary of why they think they can beat Kimbo, to be emailed in. The winner of the competition will rumble with Kimbo in the opening fight of the January 30 card. What a ****ing circus Kimbo's boxing career is atsch
I assumed we're talking about prime Abott and Butterbean, I don't know if Kimbo ever had a prime But Butterbean has still enough power to stop both of them