Green Baron is an unknown - a release in the I Micronauti line that never made it to the United States. Green Baron's role in the Micronaut hierarchy is also an unknown. He is obviously a baron, but is he good or evil? There is already an evil (presumably) emperor, a king, and another baron, which doesn't leave much room for career advancement. It is possible, due to the fact that the figures are almost identical except for coloring, that Green Baron and King Atlas (or Baron Karza for that matter) are enemies (or cohorts - we can only speculate). The imprint on Green Baron's back date him in 1977, but the instructions say 1978.
Except for the shape of his head and his coloration Green Baron looks exactly like Baron Karza. He has magnetic ball & socket joints in his arms, legs, and head, with the traditional rocket pack in back. The knees and elbows are held together by the usual one-degree-of-freedom joint. Green Baron is colored green (imagine that), with black highlights on his chest nubs, chest missiles, rocket pack cones, and sinister-looking eyes.
Green Baron has a the traditional rocket pack which is green, except for the upper cones, which are black. A single, black missile protrudes from the front of his midsection, which is fired from a lever which is hidden behind his rocket pack. Both of Green Baron's fists fire, activated from triggers on his forearms. Two extra fists are included, which is fortunate since they are easy to lose. Green Baron was released early enough to have the "unsafe," smaller missiles instead of the large rubber-tipped missiles, such as those included with Emperor.
Other than his coloring, Green Baron's head is really the only feature that sets him apart from the other Magno-powered Micronauts. He has triangular eye slits, which are black, and an almost fluted helmet crest - reminiscent of the ancient Greece-era helmets. There are some tiny differences, but for all intensive purposes, this is a green version of King Atlas's head.
Green Baron can become a centaur with the Pegasus figure by removing his legs and placing his torso in the cavity left by Pegasus's head. King Atlas was distributed in Italy by GiG. Green Baron was also released in Greece as Santana.