Quantization for 00 happens when Gundam 00 is in Trans-am mode which have limited time.
Nuclear Bazooka is limited to one use only and besides GP02 only have beam saber and head mounted vulcan cannon which is pretty weak. Besides is there a possibility it would destroy mechs from other series? Some would just warp/teleport(Black Serena/Zeorymer), stop time(King Gainer) or just catch and throw the missile back(Xabungle).
Nirvash, Neo-Granzon, Dis-Astranagan, King Gainer, Cybuster, Valcazard(one of the most broken mecha of SRW) are some of the mech that could beat Gundams.
Gatheringsin wrote...
Meh, just a mere chapter in the lore that is mecha.
(recent) Gundam is to mecha as Twilight is to vampires.
While that image you posted is awesome albeit some mech which I felt shouldn't be there I disagree with your view with the recent Gundam comment. While I can understand the SEED series, 00 is really good.