Mario vs Donkey Kong 2 is a much better improvement from the first because it is more solid in every way.

User Rating: 8.7 | Mario vs. Donkey Kong 2: March of the Minis DS
Well well well, our classical Donkey Kong character, Pauline, comes back to our world to celebrate the opening of the new Mario Mini Amusement Park. But wait! Pauline is captured, by Donkey Kong. Well, this isn't like the classic Donkey Kong games like when Mario had to jump up on these crooked grounds. No, you don't control Mario. Instead, you control Mini Mario's who fight there way throught 9 rooms on each 8 floors of the building your in. The amount of Mini Marios are random. You could have 2 on one room then 4 in the next. This game is like a big puzzle. You have control your Mini Marios wisely or you could lose them all and you'll have to start that level over. It will get difficult as you have to position them right so you can manuever around obstacles and earn as much coins and stars as you possibly can.This game is easy to beat if you are not focusing on getting as much points as possible. You could beat it in at least 3 hours and that would not be fun. A great feature is the level builder. Build tough obstacles that will be near impossible to get by and see what your friends online or near you can do about it. The second addition to the Mario vs Donkey Kong series is no doubt an improvement. A fan of the previous game will be firmiliar with some of the stuff in it but not all of it. This will be nothing like the classics people. If you like getting around tough obstacles and working with Mini Marios, then you'll love this. This game got a great rating, but not good enough for me no.