The first T-Pose Outbreak was an event that occurred in SMG4: Mario And The T-Pose Virus. The outbreak was caused by Waluigi feeding Shroomy a T-Pose Mushroom and having him spread it throughout the kingdom. Princess Peach was eventually able to undo the effects using 1-Up Mushrooms. This event would later be revealed to be an attempt by Waluigi to being harnessing the Power of Rejection, marking the first major event of the Waluigi Arc.
People who got infected
Who survived the Virus