Hoi flees and Tapion accepts Trunks as a friend.

Hoi claims that Tapion is the true threat and that the ocarina must be destroyed, so he attempts to steal the instrument and in the ensuing scuffle, Trunks takes possession of it and chooses to side with Tapion. The fight ensues until Tapion plays a tune on his ocarina which weakens Hirudegarn and causes it to vanish. Gohan and Videl attempt to fight it with Gohan learning that Hirudegarn is intangible except when it attacks. The lower half of Hirudegarn soon appears and begins attacking the city. Tapion flees into isolation but is visited by Trunks who takes a liking to him. Tapion is released but expresses anger at having been freed, explaining that inside of him is half of the ferocious monster called Hirudegarn that only the box was keeping at bay. With all other methods of potentially opening the box exhausted, the magical Dragon Balls are assembled and a wish to the eternal dragon Shenron is used to open it. The man introduces himself as Hoi and presents them with an enchanted music box, claiming that a hero named Tapion is trapped inside and is their only chance to stop an approaching evil.

On Earth, Gohan and Videl, acting as their superhero personas Great Saiyaman and Great Saiyaman 2, stop an elderly man from committing suicide. On an unknown world, a young humanoid is crushed to death by a gigantic monster which then vanishes as an unseen entity laughs and announces that it is headed for Earth. Series creator Akira Toriyama designed the Tapion and Minotia characters. Set after the events of the final battle with Kid Buu, the film focuses on the efforts of an evil magician, Hoi, to release the deadly monster Hirudegarn onto the Earth, forcing Goku and his friends to enlist the aid of a warrior named Tapion, who may be the only one capable of defeating the monster. It was also released on VCD in Malaysia by Speedy Video with the subtitle Explosion of Dragon Punch.

It was later dubbed into English by Funimation in 2006, just like most of the other Dragon Ball films. It was originally released in Japan on July 15 at the Toei Anime Fair. Dragon Ball Z: Wrath of the Dragon, known in Japan as Dragon Ball Z: Dragon Fist Explosion!! Who Will Do It If Goku Doesn’t Do It? ( ドラゴンボールZ 龍拳爆発!!悟空がやらねば誰がやる？, Dragon Ball Z Ryū-Ken Bakuhatsu!! Gokū ga Yaraneba Dare ga Yaru? ) or by Toei's own English title Dragon Ball Z: Explosion of Dragon Punch, is a 1995 Japanese animated science fantasy martial arts film and the thirteenth Dragon Ball Z feature film.

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