This is my lil super japan robots collection, i have the rest of the evas, but im lazy to put all.
From the left:

Giant Robo:
This is one of those very rare robots who dont have a super material armor, incredible lasers and weapons, considerated made with ancient technology, this robot works with nuclear energy, commanded with a watch remote control who works only with voice.
http://www.youtube.com/watch?v=chdTJxUHzzQ

Imperial AT-ST:
One of the rare Star Wars toys of 1984 whit his pilot, made all in plastic, have a button on the back to move his legs.

Gunbuster:
One of the most biggest super robots with 250 meters tall, a short anime separated in 4 or 5 OVAS made by Gainax. This robot have some epic battles, his armor dont seems very resistent, but have very powerful weapons like the buster beam.
http://www.youtube.com/watch?v=qGgBavtodAo

Eva-01:
Considerated a super robot, this organic mecha was one of the most favourite robots of the 90, appearing in a lot of videogames, made by Gainax like the Gunbuster.
http://www.youtube.com/watch?v=5gGot3j5RX4

Mazinger Z:
Who dont knows Mazinger Z? well know in japan as Majinga Z and in america as Tranzor Z, Mazinger is one of the percusors of all the mecha anime and the first robot who was piloted from the inside. Mazinger Z is still one of the strongest robots in all the super robot wars series.
http://www.youtube.com/watch?v=SyRoF689VRE

MazinKaiser:
This beast, created in one of the games of Super Robot Wars to give Koji (his pilot) a better and updated robot, because compared with the new robots of his pals (like shin getter, grendicer, etc) Mazinger Z start to be obsolete, the lil history begins with the Prof. Yumi (Sayaka's Father), who ask help to the Prof. Saotome (Getter Robot), some help to buy a powerful robot for Koji, after this, the robot have a lot of popularity, and finally was redesigned with the approvation of Go Nagai to make his own anime.
http://www.youtube.com/watch?v=GG5SIOPfBjk

Time Bokan Mechabuton:
The First Time Machine and most utiliced in all the anime, the Mechabuton, made by Dr. Kieda (Prof. Kilovatio in Spanish) This machine which resembles a Japanese rhinoceros beetle is capable to travel in the time. The Dr. Kieda was lost in the first test travel in the machine, and the machine comes back without him, only with a parrot who have a "dynamond" a strange powerful dinamant, and the protagonist, Tampei and Junko travels in the time to find Dr. Kieda, but they are always fighting versus the Trio Gaikottsu who wants the "dynamonds" to conquer the world, giving us a really good fights between the machines.
http://www.youtube.com/watch?v=OjaWjvsmEFg