The Legend of Zelda Phantom Hourglass Walkthrough part 16

So annoying to do this with the mouse... so afterwards I decided to do it on an actual DS... I got over 1000 hits... it doesn't count higher than 999 hits, though.

After you get the heart container from him, you can get rewards depending on how many times you hit him. If you hit him between 100-199, you'll get a treasure. If you hit him more than 200 times, you get a ship part.