• New article from the Springfield Shopper: Season 30 News: A Teaser for “Treehouse of Horror XXIX” has been released
  • Only until Treehouse of Horror XXIX airs!
  • Check out our article on the new Treehouse of Horror teaser for The Simpsons: Tapped Out!
  • Wikisimpsons has a Discord server! Click here for your invite! Join to talk about the wiki, Simpsons and Tapped Out news, or just to talk to other users.
  • Make an account! It's easy, free, and your work on the wiki can be attributed to you.
  • Welcome to Wikisimpsons!

Petroleus Rex

Wikisimpsons - The Simpsons Wiki
Petroleus Rex
Petroleus Rex.png
Artwork of Petroleus Rex from The Simpsons: Tapped Out
Character Information
Male ♂
Alias(es): Rex Bernstein
Occupation: Supervillain
First Appearance: "Married to the Blob"
Voiced by: Harry Shearer

Petroleus Rex (real name Rex Bernstein) is an enemy of Radioactive Man and a member of The Fossil Fuel Four.


Before becoming a supervillain, he was environmental scientist Rex Bernstein. He was attacking the Zenith City nuclear power plant with the rest of the Fossil Fuel Four. Together, The Fossil Fuel Four defeated and killed Radioactive Man.


He can shoot gas from the pumps on his arms.


Donut Homer.png The contents of this article or section are considered to be non-canon and therefore may not have actually happened or existed.
This section is transcluded from The Simpsons: Tapped Out characters/Fossil Fuel Four. To edit it, please edit the transcluded page.
Petroleus Rex
Image Cost Unlock method Unlock message
Petroleus Rex.png Donut Tapped Out.png175

Donut Tapped Out.png60

Donut Tapped Out.png60

Superheroes and Superheroes 2
Tar Pits, Premium

Superheroes Return
Tar Pits, Premium (Heroes and Villains Mystery Box)

Super Powers
Tar Pits, Premium (Mystery Box The Sequel)

Petroleus Rex Unlock.png

Behind the Laughter[edit]

His name is a reference to Petroleum and a Tyrannosaurus Rex.