I only played and beat MMZ3 and at first I thought "HOLYFUCKINGCOWSHIT HE SHOULD BE DEAD WHAT'S THIS EXTRA LIFE BAR ****!" But, like all MM games once you know the patterns its a cake walk, only in MMZ you get to get in close to enemies and rip their weapons right off their bodies

I beat the game though, and it didn't feel all that hard.. I may have not gotten the best rankings in each level but I still beat it. I also finished the games with very little knowledge of how the elf system worked, so aside from maybe the doublejump.. I don't think I got many upgrades. Just goes to show its not THAT hard....
Hell if anything the hardest part was trying to play it on the GBA SP

(I always tried to play any gba games on a gba before switching over to the DS)