This idea actually came from my 5 year old son as we were watching G vs King Ghidora (1991) last week. There has been Mechani-Kong, 3 different variations of Mecha Godzilla, and Mecha King Ghidora (really more a cyborg than a robot) but.... If you could make a Mech out of, or turn into a Cyborg, any other Kaiju, which would it be?
My son instantly came up with Mecha Anguirus, which I thought would be quite interesting. Just seeing all the spikes on his back double as missiles ala Showa MG's finger missiles would make him quite formidable. Add a ray of some sort from his mouth, and I think that would be quite an awesome robot monster.
There has never been a "Scientifically Accurate" Dinosaur portrayed on any Television Show, Movie, or Documentary. Only what the human imagination can conceive, and I'm ok with that.