Almost as good as the first.Almost...
The story is kinda easy to follow.Kamek is kidnapping babies for Future Bowser,who wants the stars inside 8 of them so he can gain ultimate power,the only babies that are saved are Mario and Peach.Mario lands on Yoshi and so the adventure begins again.
This game uses both screens on the DS so you shouldn't have to worry about guessing.The controls are easy to use as they haven't changed since the last game.Later in the game you are accompanied by Baby DK,Baby Wario and Baby Bowser?(It will become clear if you play the game later)
The game is very easy at first,though you WILL find yourself coming back to previous levels with the right babies to collect everything.However the Secret levels and World 5 will make you want to tear your hair out and eat it.
All in all this game is almost as good as the Prequel,there are even some minigames and a Time Trial mode.But if you want an easy platformer don't but this game.Only buy it if you are a true platformer.