This is Toa Zelak, Guardian of Mata Nui. He fights with a huge sword and his battle vehicle, The Annihilator.
About this creation
Toa Zelak and Toa Xenar are guardians of Mata Nui. When it was found out that Mata Nui, Xenar left Mata Nui and Zelak stayed to protect him. But Xenar returned transformed by the shadow leeches and served the Brotherhood of Makuta! Zelak was sent on a mission to stop Xenar.
Zelak is a Toa of Earth and wears the Mask of Gravity, giving control over the force of gravity. His battle vehicle, The Annihilator, is a massive vehicle that hits like a battering ram.
Side view of the Annihilator:
Unfortunately, I found out after I built it that Zelak was my only Bionicle able to ride this thing properly.