Plum

From RayWiki

A plum is an oversized fruit that is found throughout the Rayman series. It is purple in colour, and grows at a very fast rate. It can be knocked down from its tree. Notably, this is the only item aside from cages that has appeared in all three major Rayman platformers.

In Rayman 1, plums are used to float through swamps and can also be thrown at Livingstones, making them harmless: then, it will be possible to jump onto them. When the plum is on the ground (where it keeps rebounding), Rayman must hit it with his first to move it, whether he's in front of it or on it (in this case, he'll have to shoot and then to duck so that his fist's comeback hits the fruit he's on). Once in water, it follows Rayman's look, who can simply change the direction by turning backwards.

In Rayman 2, they're used to travel through rivers of lava but can also be thrown at Gorilla Pirates, who will also become harmless and static. Rayman can move plums by shooting at them if they're in front of him, or by shooting anywhere if he's on it, which will move it in the opposite direction. It's also possible to throw them onto posts, permanently or temporarily (in this case, the goal is to take the plum to a precise place), allowing Rayman to reach places he couldn't. Plums keep rebounding, even on lava.

In Rayman 3, plums don't rebound anymore, and their sole purpose is to be thrown onto posts to reach high places. It's also possible to carry them.