Nemesis (Transformers Japan)

Nemesis was a giant, Unicron-like planet-sized weapon under the control of Galvatron. Capable of consuming worlds, Galvatron planned to have it consume the Angolmois Energy from the planet Gaea- which would destroy the planet in the process. Lioconvoy and the Cybertrons ultimately sacrificed their lives to destroy Nemesis and save Gaea.