Damn. I just copied and pasted it from the other forum, so I didn't proof-read it. *edits*
In the American version the damage you can incur with Chocobuckle equals how many times you've run from battle. In the Japanese version the damage equals how many times you've run from battle multiplied by 100.
For such a difficult enemy skill to get, it should have more reward like in the Japanese version.
I completely forget where I found this information. Maybe it was in a FAQ/Walkthrough.