Metatron is an archangel in Judaism. According to Jewish medieval apocrypha, he is Enoch, ancestor of Noah, transformed into an angel. There are no references to Metatron as an angel in the Jewish Tanakh or Christian scriptures (New and Old Testament). Although he is mentioned in a few brief passages in the Talmud, Metatron appears primarily in medieval Jewish mystical texts and other post-scriptural esoteric and occult sources. In Rabbinic tradition, he is the highest of the angels and serves as the celestial scribe.
While he does have a cube (for understanding the tree of life?), Metatron is not to be confused with the sentient robotic lifeform Megatron (of Transformers fame), though both are described as having formidable power. Metatron can also be found in Megami Tensei role-playing video games. Happy New Year!