The Chef:
After you get past the chef to find the ticket and you return it to the little Asian boy, you do not have to worry about the chef again. He is now in a good mood.

Tennis with Jack-In-The-Box:
When you playt tennis with the Jack-In-The-Box, try to get the power ups on the court. Also, when you serve the ball, try to serve it on the opposite side of him. This works most of the times.