Dragon Ball Z: The World's Strongest

Gohan and Oolong search for the magical Dragon Balls and their radar shows them that the orbs are being gathered by another, unknown party. They investigate near a large wall of ice where Piccolo is training. Meanwhile, the mad scientist Dr. Kochin, having successfully gathered all of the Dragon Balls, summons the eternal dragon Shenron and wishes for Dr. Wheelo and his lab to be released from the ice. The ice breaks away as a building emerges and Gohan and Oolong are attacked by Dr. Kochin's "bio-men". Piccolo saves them but is overcome by three mysterious warriors while Gohan and Oolong escape.

Dr. Kochin and his bio-men soon present themselves to Master Roshi who refuses to accompany them to Wheelo's lab and defeats the bio-men. Dr. Kochin kidnaps Bulma to force Master Roshi to pursue them. At Wheelo's lab, Master Roshi is forced to fight three "bio-warriors" but is swiftly defeated. Bulma discovers that Dr. Wheelo's mission is to obtain the body of the strongest warrior on Earth to become the host for his brain, which is currently separated from his deceased body and kept alive by his advanced technology. Bulma informs him that Goku will undoubtedly be coming to rescue them and that he is much more powerful than Roshi. Meanwhile, Goku learns of situation and he arrives at Dr. Wheelo's lab and is confronted by Mikokatsun, Kishime, and Ebifurya – Dr. Kochin's three bio-warrior henchmen. Goku defeats Mikokatsun but is frozen by an ice-like attack launched by Ebifurya. Gohan and Krillin arrive to help but are no match for Kishime. Goku breaks free from ice with his Kaio-ken technique, defeats the two remaining bio-warriors, and confronts Dr. Wheelo. Piccolo, who has been brainwashed by Dr. Wheelo, attacks Goku. Gohan tries to stop Piccolo but fails, causing his anger to explode, shattering Dr. Wheelo's brainwashing device. Dr. Wheelo is stunned by Gohan's power and desires to steal his body instead. He breaks his robot body free from the ice wall, subsequently knocking Dr. Kochin down a shaft which kills him.

Dr. Wheelo attacks, overwhelms the fighters, and only Goku and Piccolo are left to oppose him. Goku knocks Dr. Wheelo into the atmosphere and begins to form a Spirit Bomb attack. Wheelo interrupts him before he can finish gathering the energy for it requiring Goku's allies to distract Wheelo. Goku's successfully launches the bomb and Wheelo is killed.

A fourth English dub, produced and released exclusively in Malaysia by Speedy Video, features an unknown voice cast.

• OP (Opening Theme):
  • "Cha-La Head-Cha-La"
    • Lyrics by Yukinojō Mori
    • Music by Chiho Kiyooka
    • Arranged by Kenji Yamamoto
    • Performed by Hironobu Kageyama
• IN (Insert Song):
  • "I Lo~ve Mr. Piccolo♡" (ピッコロさん　だ〜いすき♡, Pikkoro-san Da~isuki♡)
    • Lyrics by Chiroru Taniho
    • Music by Takeshi Ike
    • Arranged by Kenji Yamamoto
    • Performed by Masako Nozawa
• ED (Ending Theme):
  • "The Battle" (戦（I・KU・SA）, Ikusa (I•KU•SA))
    • Lyrics by Dai Satō
    • Music by Takeshi Ike
    • Arranged by Kenji Yamamoto
    • Performed by Hironobu Kageyama

At the Japanese box office, the film sold 2.7 million tickets and earned a net distribution rental income of ¥1 billion.

Overseas in Europe, the film grossed $1,009,767 in Germany, Austria and Poland during 2002–2003.[2]

It was released on VHS and DVD in North America on May 26, 1998, with an English dub, produced by Pioneer Entertainment in association with Funimation. Pioneer's dub used the original Ocean Productions voice cast of the TV series. Since then, Funimation was released the Ocean dub of the film on the Rock the Dragon Edition DVD set on August 13, 2013, it has 53 edited episodes of the TV series, plus two edited films of Dead Zone and The Tree of Might as they aired on Toonami.

Once their sub-license expired, Funimation also released the film to DVD in "Ultimate Uncut Edition" on November 14, 2006 as part of a film set subtitled "First Strike", also containing Dead Zone (1989) and The Tree of Might (1990), with completely new dub done by Funimation's voice cast. It was later released in Double Feature set along with Dead Zone (1989) for Blu-ray and DVD on May 27, 2008, both feature full 1080p format in HD remastered 16:9 aspect ratio and an enhanced 5.1 surround mix. The film was re-released to DVD in remastered thinpak collection on November 1, 2011, containing the first 5 Dragon Ball Z films.[3]

• Official anime website of Toei Animation
• Dragon Ball Z: The World's Strongest at IMDb
• Dragon Ball Z: The World's Strongest (anime) at Anime News Network's encyclopedia