User blog comment:Kaido King of the Beasts/Chapter 796: Dicey Motives/@comment-5632489-20150806061755/@comment-4889755-20150806214817

Well, you havent seen his crew so why assume theyre weak? Bart is really strong, and Gambia has a bounty of 67,000,000 so he's presumably nothing to scoff at.

I'm imagining a moment similar to when Luffy asked usopp to join. Bellamy isn't sure where to go, but Bart already assumed he was going to join him and says something like "we fought together, we're nakam arent we?" and then Bellamy goes with him.