He's talking about Peach. Although he's just full of himself. Peach disagrees about the fianse thing.
Mario:Wait Luigi, I have two guys to get rid of, Bowser and this Parker. He said peach was his fianse yeah right.
at daisy castle....
Luigi: Eeeeeeeeeeeewwwwwwwwwww............
Mario: Look at this place, it's been raided wi-with....
Luigi: expired pork.....once again, eeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeewwwwwwwwwwwwwwwwwwwww.........................
Mario: I eat meat but not like this.
Luigi: I'm a vegetarian........ This is digusting!!
?:HahHaHAHAHAHA!!!!!
Luigi: Huh?!
Mario: WHO IS IT?!
?: IT IS ME ANTI-LUIARIO!!!!
Mario: Anti- eh.......wha?!
Luigi: Anti-pineapple or something....
?: I'm the most feared guy in the universe!
Luigi: DUDE, WE DON'T EVEN KNOW YOU!!!!
Mario: What are you planning?
?: Think about it, meat, mushrooom guys, money, a new year, FOR EVERYONE!!!! YOU GUYS HAVE THE BEST MUSHROOMS IN THE WORLD! SOON, PEOPLE WILL STOP EATING MEAT IF THEY FIND THIS PLACE! I HAVE COME TO SOLVE THAT! IT'S A WHOLE NEW YEAR OF MEAT WITH SIDE SERVING OF COW LIVERS AND CHITLETS! HAHAHAHA!!!!
Luigi: That is so nasty. Man, you really are a rookie.
?: NO I'M NOT!!
Luigi: You have a towel with a picture of a fruit bowl filled with meat for a cape and a bib with a lobster on it.
?: So do I, huh? Well, THAT'S IT! MINIONS ATTACK!
Mario: Luigi all the meat's comin' alive!