As one of the last games on the NES, it is considered one of the rarest and most expensive game on the system, and despite it's rarity, Chip 'n Dale Rescue Rangers 2 just isn't worth the price tag. Not that it's bad as it just isn't as remember-able or as good as the original game was.
Rescue Rangers 2 has a lot of updated graphics and even new cutscenes to help make for a better story, but what gets me the most about it is just how much it just feels like playing through Mega Man stage as a Disney character with Disney-esque enemies. In the original game there was a nice sense of scaling and while there is some of that here, mostly in the first level, the rest of the game is left to be desired. It's not entirely to the point where this game breaks atmosphere, but it's still there to the point you question every now and again why Chip and Dale are doing these actions.
Thankfully with the Disney Afternoon collection, you do get this game along with the original, and for a 15$ price tag, makes it all the more worth it to try. Rescue Rangers 2 still has all the old mechanics of the original, and the ability to co-op is still one of the best things about this game, but just don't expect it to be any better because it's technically worth more.