i say master cheif cuz now all da games dat r marios suck and most spartans did not survive the injections and died and cortana picked (john master cheif) and she helps him with his mission and helps master cheif aim. go 2 u tube and type haloid it is by mounty oum and look for dead fantasy 1&2
ARE YOU KIDDING ME? Of course Master Chief? Mario shoots fireballs, Master Chief shoots flame throwers. Mario jumps on Chief, Chief would be like "wtf you doing?" then shoot him. Oh and I'd have to agree with yahimkool, CABOOSE WOULD OWN THEM ALL!