In 1991's Godzilla vs. King Ghidorah, many viewers were shocked when the origins of Godzilla were tied back to a mostly harmless Godzillasaurus. And, due to its lack of popularity, not many iterations of Godzillasaurus were made in toy form. The best known example is this 8" scale version, released as part of Bandai's Godzilla Collection in 1992. The dinosaur and savior of the Japanese garrison on Lagos Island stands 5.5" tall and is 9" long.
Godzillasaurus (Bandai, 1992)