After Master Shen kidnaps Chiaotzu, Tien and the others get worried and go looking for him. They ask Fortuneteller Baba where he is, to which she replies he is in Mutaito's Training Grounds. Tien, Yamcha and Krillin soon make their way to the area, and encounter Master Shen in a cave, at the top of the mountain. He then explains how he was angry at Tien for humiliating him and his brother, Tao. He then unleashes his robot weapon, the TPP - EX. The TPP - EX was quickly disposed of by the group, and then Tien threatened Shen, who promptly left, never to be seen again (except in flashbacks).
Techniques and Special Abilities
The TPP - EX has all the same abilities as the Pirate Robots, but lacks a sword. However, he can absorb Ki attacks: he regains HP whenever one hits it.