if you could make a real case scenario where mario and luigi, with all there avaliabe moves, could fight master chief and the arbiter from halo 3 with there starting weopons, who would win.

Master Chief and the Arbiter would win

 really. maby with an instant sparten laser in the shotgun seat of a warthog in a pelican when mario and luigy are strapped together back to back at point blank range

Masterchief and Arbiter would win hands down.

it looks like we have a consensis. still, mario bros. cant die

Mario Bros would win easily.

totaly

MARIO BROTHERS!!!!!

Masterchief and Arbiter

mario brothers because they could just grab a star and lay down the beating!

Mario bros. rock!!!!!!!!!!!!!!!!!!!(Luigi is awsome!!!!!!!!!!!!!)

hehehe, don't have hypothetical fights againt the mario bros.  They are impossible to determine a real canon basis.  Are they really just plumbers who are good at jumping?  Or can they truly become 100% invulnerable with a star.  If they walk into a scarab with a star, with the scarab instantly die?  Well, you might say so if you are of the opinion that they become totally and completely powerful. 

However, if you see the mario bros as guys who eat mushrooms and jump high.... then yea MC and arbiter win in 2 seconds.

 mario bros could just get a star or something and start kicking butt

Master chief and arbiter!!!