Went digging around and found Wildtoy's Shogun Warriors page, the source for info on one of the neater toys Mattel came out with in the mid-70s.

My brother and I played with these things constantly. Rember this was well before anime was well known or popular in the US, so while giant missle-firing robots were almost passe in Japan, there just wasn't anything quite like them over here. I found out recently my brother bought his son two of them off e-bay, so the cycle has turned again.

Now if I can just find a ROM in really good condition...