Magnaboss is the name of two different fictional characters in the various Transformers universes. The first is the US version of the character created by Hasbro, while the second is the Japanese version, created by Takara. Despite their similar looks and names, they are treated as separate characters in the fiction, with the US version being the original character, and the Japanese version imitating him.

Read more about Magnaboss:  Beast Wars, Beast Wars Second