This limbless port of the 1998 classic has absolutely nothing going for it.
In 2005, a DS port was released as Rayman DS, and while it was essentially the same game that came out in 1998, it became awfully clear that its immersive environments weren't designed for a handheld console. While graphically, this game seems more or less on par with the respective N64 and PSX versions of Rayman 2, Rayman DS will be quite underwhelming for those who have played its home console counterparts. There's just no good reason for this game to even exist, seeing as everyone probably at least one home console on which it has appeared, or at least a PC. And with the entire point of handheld games being that you can pick up and play games whenever you want, and put them away as soon as you reach your destination or the end of the queue, there's very little reason to play an immersive game like Rayman 2 on a handheld rather than a home console of your choosing.
Actually, things wouldn't be as bad as Rayman DS was as enjoyable as the versions that preceeded this port, but it's not. The controls have proven to be absolutely dreadful with DS controls. Seeing as a lot of jumps and platforming parts in Rayman have to be timed and aimed rather precisely, the normal D-Pad doesn't provide the right amount of accuracy in a lot of cases. The developers probably realised this as they've added a virtual D-Pad that is supposed to add a little more accuracy, but if any, it just makes the game more frustrating. You have to control it using the stylus on the touch screen, but especially in heated battles, this option is entirely useless, and switching to this control method everytime you come across a difficult jump is no less of a drag. To put some more rotten icing on a cake that went way past its sell date, the horrid camera only adds to the unplayability of this title.
I could go on for a while, but there is essentially nothing more to this than Rayman DS being a particularly frustrating and unnecessary Rayman 2 port that is as underwhelming as it is unplayable. Trying to find a copy of Rayman Revolution for the PS2 will be a lot more rewarding, and even if Rayman DS has the advantage that you can play it while you're on the road, the amount of frustrations you'd have to overcome completely neutralise any form of enjoyability you may have derived from this feat. The final grade might seem like an overreaction, seeing as technical aspects such as graphics and sound are actually quite good, but the controls and the camera have ruined this game down to a point where it's almost unplayable.