Wow haven't been on here in ages. Anyways I picked these guys up at goodwill and I cannot find pics online of matching ones. I know it's a good chance they are just dollar store junk but I like them. There is no marks or dates on any of them.
Cool finds! They are all bootlegs, and might have been labelled by a few different names. The larger two you have there are Agira and Mechagodzilla, while the small two are just randomised kaiju characters (more a mash-up several different creatures usually) that were sold under a line call Super Dinosaurs/Super Dino Monsters. These guys are always popping up here and have been discussed quite a few times, but you can find more info on them here: http://actionfiguresca.proboards.com/thread/7080
Thanks for the info guys. The little blue guy is my favorite. I grabbed them more to save them so if anyone wants to adopt one pm me. Gutter you have a pm.