The movie you are talking about is Crash and Burn, released as Robot Jox 2: Crash and Burn in Europe.
BadMovies.org plot summary
After watching numerous movies about the future I have decided it sucks, whether it be evil companies taking over, the development of killer robots, or an environment ruined by man's hubris. Unfortunately for the characters populating this movie, all three have happened; it has been a bad century.
When the small group inhabiting a wasteland television station realizes one of their number might be a ruthless synthetic human, they do what every other group would do: rip off of John Carpenter's "The Thing." That is right, cut everyone's finger to see who bleeds oil, but it does not work since the robots are full of stage blood (oh, I mean red freon). Perhaps there was an easier way, like noticing that two characters never sweat even when everyone else is dripping wet! I noticed it, probably over half the audience noticed it, why did Tyson or Arren not notice it?
Tyson does catch on to the fake people and soon a game of cat and mouse (if cats were made from steel and mice used shotguns) is played out through the station's dark corridors. None of it should surprise you, especially not one of the hookers deciding to take a shower and being killed. Only when things look hopeless does our heroine play her trump card, the DV-8.
The video cover prominently displays the DV-8. It is an old mining or construction robot quietly rusting away in the local scrap heap. Arren has taken the time to fix it up and feels confident about piloting the thing. Despite a quick conversation in which we find out that it took "months" to learn the monster robot's controls, it does not look very difficult. If you want it to stand, then you type "stand." I am sure any other veteran Zork players out there would feel comfortable at the controls. In fact, screw throwing the rusty knife at the cyclops' eye, I want to type "punch cyclops in head" and be done with the annoying lout once and for all.
You are going to spend the entire movie waiting for the DV-8 to do something cool, you are also going to be very disappointed. It walks about a hundred yards, lifts up a fallen girder, steps on Quinn - then falls to pieces. Obviously a GM product.