Just the one like, when you ate the Crunch fruit, you learned an extremely powerful version of Crunch, and that's it. If Dexter'd eat the Thunderbolt fruit, he could suddenly make an immensely powerful Thunderbolt, but he couldn't swim.
Well, anyone who's read/watched One Piece, would know what it is
But basically, it acts like a TM, only two things: 1. You can't swim when you've eaten a fruit. 2. The move the fruit teaches is 3 times as powerful as the normal version of said move.