The island is recognized as its own sovereign nation. Jonas Junior outlawed smoking cigarettes and alcohol, but legalized marijuana and gay marriage.
The island was left in the care of Rusty Venture after his father died and he used it for storing the X-2 when he was not using it. At the end of the season, it was given to Rusty's twin brother Jonas Venture Jr along with the X-2 to make up for consuming him in the womb.
Rusty would eventually return to the island to try to steal a part for a machine that his father built, but was discovered by Jonas and The Pirate Captain who decided to help them with finding the remaining parts by loaning them the X-2 and XX-1.
Spider-Skull Island became the site of the Jonas Venture Jr. Museum of Jonas Venture. It was nearly destroyed by a long-dormant self-destruct device at the grand opening, but Professor Impossible managed to contain the explosion.
Spider-Skull Island was left to Sally Impossible due to J.J.'s passing, as per his will.
- Return to Spider-Skull Island (mentioned)