While Master Roshi is not often thought of as one of the most powerful characters in the Dragon Ball franchise, his enemy Dr. Wheelo was strong enough to take on Goku and Vegeta in their Super Saiyan 4 forms. Dr. Wheelo is the villain of the film Dragon Ball Z: The World's Strongest. He is never seen as a human in the film, but instead appears as a giant mechanical suit hosting a brain almost ten times the size of a normal human one. Despite his stunning appearance, he was hardly ever referenced again outside the film for decades, until returning in the Super Dragon Ball Heroes manga.
Dr. Wheelo’s original intentions in the movie are to capture Master Roshi, who at the time is still considered by many to be the greatest martial artist who ever lived. Wheelo wants to transfer his brain into Roshi’s body, believing that humanity’s greatest brain inside of humanity’s strongest body would prove invincible and grant him the power to conquer the world. In the Super Dragon Ball Heroes: Big Bang Mission!!! manga, Wheelo’s human form is revealed, with him now going by Dr. W instead. Wheelo has now allied himself with the demon Fu in order to create a new universe solely to gain the respect and admiration of those living on the new Earth that would come with it.
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Wheelo is considerably stronger in Super Dragon Ball Heroes. In the original film, he is destroyed by a base form Goku’s Kaioken x4 Kamehameha, but is more than capable of out-speeding Super Saiyan 4 Vegeta in Super Dragon Ball Heroes. Wheelo doesn’t even consider fighting Super Saiyan 4 Goku or Vegeta as he deems them both beneath his efforts and instead relies on dodging their attacks until his
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