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The fortress looks like a bigger version of Dr. Wheelo's cyborg form. The two doctors use it to travel either on or under water. It is where they conduct the researches that led to the creation of the Bio-Men, Misokatsun, Kishime, and Ebifurya. It is also where Dr. Kochin transformed Dr. Wheelo into a cyborg in order to save him from death.
Fifty years before the events of Dragon Ball Z: The World's Strongest, the base was frozen over by an avalanche in Tsumisumbri Mountains. Dr. Kochin gathers the Dragon Balls and summons Shenron at the beginning of the movie to wish that the fortress, along with Dr. Wheelo inside, would be released from the unmeltable ice. Dr. Kochin then uses the fortress to go to Kame House, where he finds and kidnaps Master Roshi and Bulma.
The entrance of the fortress is a heavy steel double door. The first floor contains moving spiked balls, it is where Goku fights Misokatsun. Goku fights Ebifurya and Kishime on the second floor, and a brainwashed Piccolo on the third floor. It is also on the third floor that Master Roshi fights the three Bio-Warriors. On this floor, there is a giant screen and two forcefields; the first forcefield is used by Dr. Kochin to hold Bulma prisoner and the second one is used by Dr. Wheelo to attack Goku. The lab seems to be on the last floor of the fortress.
The fortress is destroyed when Goku used his Kaio-ken Kamehameha against Dr. Wheelo.
- Dr. Wheelo's fortress has several things in common with Muscle Tower from Dragon Ball. Both are located in cold and snowy climates, and both have levels Goku travels through to rescue someone being held hostage. Additionally, Goku faces an opponent with a stretchy body (Misokatsun and Buyon, respectively).
- The aesthetic of the fortress and its interior are vaguely reminiscent of the various designs of H.R. Giger.