looks: best: kiryu
worst: Jet Jaguar or M.O.G.U.E.R.A
strength: best: tied between
-Kiryu and M.O.G.U.E.R.A (so many weapons)
-Mecha Godzilla 2 (if i remember correctly it almost killed Godzilla)
worst:Mecha Godzilla 1 (the other mech will think it's the real Godzilla and attack it together)
agility: best: M.O.G.U.E.R.A (it can turn between Land Moguera(can drill through the Earth) and Star falcon(can go to space))
worst:probably the first Mecha Godzilla
Armor: best: Mecha Godzilla 2
worst: maybe M.O.G.U.E.R.A
so what would happen is :Everyone would attack MG 1 because the Fake Godzilla disguise. then, M.O.G.U.E.R.A would dig underground and hide while the other Mech fight. Kiryu would exchange fire with MG 2 but kiryu will slowly lose power. and then MKG would be destroyed by MG 2.and finally M.O.G.U.E.R.A would come out and fight MG 2 from a distance but would be overpowered by MG 2
Now if I were to bring this into a battle scenario, keep in mind, this is my opinion:
Jet Jaguar would go up to Fake Godzilla thinking he's the real Godzilla and be attacked, he would then join forces with the other mechs to defeat the imposter since all the other mechas are proogrammed to kill Godzilla. They would all destroy the disguise then Showa Mechagodzilla would lash out with his weapons. The four other mechs would eventuallt overpower and destroy Showa Mechagodzilla. Jet Jaguar would fly off to parts unknown while the other Mechas wouldn't even fight each other since they all work for the government, and would likely just be called back since the mission was over.
Oooohhhh, cookies! Can I have one?