Getter Robo G, or the "Anti Getter" as you've referenced, is the second Canonical form of Getter Robo that appears in both the Manga and 70's anime, albeit it's design is slightly changed to look a bit more sinister. It's basically a step-up from the original generation Getter Robo, boasting it's own array of weaponry and special abilities that surpass it's predecessor. However, when pitted against Shin-Getter Robo with it's veteran pilots, you can really see how the power levels match in the anime version of this fight. Saotome may be the Creator of all Getters, but a Veteran Team can still out-shine him and his Mad-Scientist cohorts.
