Laser-Washing Powder
The Laser-Washing Powder (cans) is a power-up that gives Rayman to overcome various obstacles that couldn't be passed otherwise. You get these power-ups in Rayman 3 on the first level. In the game, you add more and more power-ups to your arsenal. The laser-washing powder also doubles the amount of points you earn when collecting gems, making you able to unlock more minigames, and get a higher rank on the ranks list on the lums quest (doesn't work anymore).
The Different Types of Cans
In the game you come across five different types of power-ups.
Vortex Green
Heavy Metal Fist Red
Lockjaw - Blue - allows Rayman to throw Claws at enemies, you can shock the enemies until they are defeated while latched on. This also allows Rayman to grab onto floating rings (which replaced the purple lums from Rayman 2).
Shock Rocket - Orange - allows Rayman to shoot a guided missile at his enemies.
Throttle Copter - Yellow - allows Rayman to fly into the air. This can lasts for only 3 seconds.