Basically, Mario was just a platformer with a bunch of awesomeness. Then the creators of Final Fantasy decided to make an RPG of Mario, and guess what? It was good.
I already finished the game, and It´s worth playing the game, and watch out for the secret boss, here´s a something about him: *SPOILERS* There are 5 mosters, and 4 of them are the elemental crystals of the Final Fantasy series, and the battle music is the boss fight music from Final Fantasy 4, even the battle fanfare! Watch out, the boss is hard, be at a high level and have a LOT of high-recovery items and items like Rock Candy. *END SPOILERS*
I miss this game so much. I used to be obsessed with it. XD Only time Nintendo and SqueEnix worked together.