Just released today, check out the GR-8 papercraft from the official Giant Robo web site.
For those in the dark, Giant Robo (ジャイアントロボ) is a manga and tokusatsu series created by famed Japanese manga artist Mitsuteru Yokoyama, who also happens to create that other popular robot series, Gigantor (Iron Man #28). The Giant Robo web site has been steadily releasing papercraft after papercraft of their beloved robots to coincide with their celebration of Giant Robo's 40th anniversary. All papercraft robots on their site are created by Chokipeta.
GR-8 [Download]
Giant Robo [Site]