I think it’s implied that the fruit you land on is the fruit that returns rayman to normal size. And either the fire teensy at the end is guarding the fruit (because it’s “sacred” or something) or he’s the one that shrunk rayman and is trying to stop him from returning to normal.
... Don't get it. Why a Teensy is the Final Battle? Why? They added Mr. Dark, but why make an Teensy the bad guy? Man, i feel like didn't really cared about this one.