who would win in a fight multiple possibilities

[Gecko brothers]

Spike vs. Vash the  Stampede
Blue Gender bugs vs. Starship troopers arachnids
Jack Crow(from Carpenter's Vampires) vs. Seth Gecko from Dusk Till Dawn
Carlos as the El Mariachi vs. Antonios El Mariachi
Mike Myers vs. the fisherman from Blood Hook
Killer Klowns or Barney, Teletubbies, Bozo
The old blob(54 the new blob(82)
Aliens or the Thing(82)
The fog zombies or the 13 ghost(yeah they suck
Ghost from the matrix vs. the judicial guy from Equiliberium
The T-X or the predetor