I just recently finished playing "Luigi's Mansion: Dark Moon" and I've got some stuff to say about it. I'm gonna do this Ultronite style and put it into catagories.
GAMEPLAY: The game plays real nice. As apposed to the original's console"s many, many buttons that confused me, the simple ABXY buttons and RL were easy to use. The use of a circle pad to move around with was awesome too. The difficulty of the overall game proved to be challenging (in a good way) and was chock full with enough puzzles to satisfy professor layton!
STORY: The storyline played out as follows: Luigi is at home watching tv (because thats what plumbers do when they're out of a job) when suddenly professor E. Gadd, a series mainstay, calls luigi back into action. Apparently, a mysterious enemy has destroyed the dark moon, a crystal in the sky that kept all the ghosts at bay. Without the dark moon, the ghosts had become violent and it was up to luigi to find the pieces of the dark moon in many mansions(as apposed to the single mansion in the first game) and stop the mysterious enemy(SPOILERZ:its king boo again) I was kind of disappointed with the ending and the final boss fight. King boo, seems like the biggest, most difficult boss you ever faced, but it turns out he goes down just as easily as the other ghosts that he controls. I guess it was nice to see mario make a cameo in the end.
Overall Mark: The gameplay was awesome, the story was less so, but by only a little bit, and it was filled with tons of gags and jokes (even E. Gadd's terrible puns. blech!) This game I would give a seven out of ten: well worth your eshop points!