PAC-MAN is a Premium Box Tsum. He is a Limited Event Tsum and is not available from purchasing Premium Boxes outside of the event. He was first introduced during the Japan Event Tsum Tsum's Big Adventure (October 2019) and the International Event Film Collection (November 2019).
PAC-MAN will clear surrounding Tsums when you trace a chain. His base Score Multiplier is 1.5x and his base number required is 23. Higher Skill levels reduce the number required.