Minecraft Legends:Great Grungert

"“That will never happen! We will not let it!” Uggub snorted dismissively. “That's what Grungert said too— before you took the bastion from them! This is the piglin way! We take until we are taken!” Bungus refused to accept any of that."

The Great Grungert is an unseen character mentioned in Minecraft Legends: Return of the Piglins. The original leader of the largest bastion in the Nether, Kritten and Bungus managed to overthrow them under unknown circumstances.