What dinosaurs do you need to get a bionic rex skin in ark survival evolved?

To obtain the Bionic Rex skin in Ark: Survival Evolved, you need to defeat the three bosses: the Broodmother Lysrix, the Megapithecus, and the Dragon. After defeating these bosses, you will receive the skin as a reward. It's important to note that this skin can only be applied to the Tyrannosaurus Rex in the game. Additionally, players must have access to the appropriate expansions where these bosses reside.