Transformers: Energon for sale at De Toyboys. - De Toyboys
Transformers: Energon

Transformers: Energon

Transformers: Energon action figures .
All Transformers: Energon figures from Hasbro

A small number of Transformers: Energon Built to Rule sets had a limited, test market release, and the structure of the Trans-Skeleton was changed for the Energon characters, to a much more solid skeleton with larger, blockier limbs. This led to much more solid, stable and sturdy-looking robot modes, but the entire line performed poorly, so it was dropped in its entirety in 2004.