You're better off watching the movie instead of playing Nacho Libre on DS.
Being that it was the first wrestling game for the DS. Nacho Libre was ok, but after playing it for perhaps 15-20 minutes, you might notice that the game becomes repetitive. What was frustrating about the game was that during tag matches, I didn't have a clue how to tag my partner. The cut-scenes are possibly my only positive point in the game. It was pretty funny to read the dialogue while the characters were acting like bobblehead dolls. But it is not enough to save a mediocre game, even with the $20 budget price (I guess you might say this is one of those times where the meaning "you get what you pay for" might come into play).
So, if you really, really, REALLY are desperate for a wrestling game on your DS, you might as well look at Nacho Libre. But I recommend that you watch the movie, and wait for other wrestling games to show up on the DS that might be more worth your money.