The general appearance of the Armed Legendary Equipment Legendary Giant Weapon is based on the Space Runaway Ideon (1980), but also has a Mobile Suit Gundam (1979) esque head/gunbarrels and a chestplate resembling a lion from King of the Braves GaoGaiGar (1997).
At one point the crew is told to look up the solution on Yahoo Answer, and they use the phrase, "Tomorrow won't come. What should I do?" If you use the same phrase, the best answer is the same as in the show: " You probably just forgot to tear the page off the calendar LOL. "