SuperMemeGuardian3 (originally known as SuperMarioGlitchy3), commonly abbreviated as SMG3, is the redeemed main antagonist of the SMG4 series. He serves as one of the two main antagonists (alongside Bowser) of Season 1, the main antagonist of Seasons 2 to 6, a supporting character in Seasons 7 to 9 and the tritagonist of The SMG4 Cosmology Lore Trilogy.

In the Cosmology Trilogy, he serves as the main antagonist of Season 10 and The YouTube Arc, the tritagonist of Season 11 and the Genes