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The Power Mammoth was part of a trio of three zoids that shared the "Power" prefix, the others being the Power Mantis, and the unreleased Power Kong . They were released as part of the Z-Builders line by Hasbro. As a result there is almost no information available about what this Zoid would be capable of, although it does appear to have some form of gun mounted on the end of its trunk.
Due to the shared prefix of this trio, it is often assumed that they would have had an official fusion. As the line was cancelled and the Power Kong was unreleased, it is impossible to know for sure if this was true.