My favorite giant robot show is “King of the Braves GaoGaiGar”.
Originally aired in japan in 1997, fansubbed somewhere near the early 2000s, released in 2006 and 2007. It’s truly an awesome show, but its English release is such a shame. The first half of the series was released in its full glory, with a pretty good English language cast, but poor sales caused the second half to be released only with the Japanese audio track. It is highly unlikely that we’ll ever see its sequel OVA.
Giant Quantum Robots 