Dinosaur Land

Dinosaur Land is a peaceful region of the Mushroom World, inhabited by several different species (including the Yoshis). Many various types of landscapes and areas are found here, including vast plains, elusive forests, islands, etc. Mario, Luigi, and Princess Peach once traveled here for a vacation, but were interrupted by Bowser and his Koopalings, who kidnapped the princess and began terrorizing the land ("Super Mario World"); the Mario Bros. eventually succeeded in defeating Bowser once again and rescuing the princess—while also meeting Yoshi along the way, who is now one of their closest friends.

In the "Dimension" saga, the alliance of heroes is forced to retreat to Dinosaur Land after the  Raid on Toad Town , as Bowser and the Koopalings pursue them across the sea. The Battle of Dinosaur Land initiates at this point, with the alliance doing their best to fend off the Koopalings, Kamek, and their leader (who also showcases another form of his: Dry-Bone Bowser); the face of their opponent soon changes, however, as Metal Sonic appears and shifts the battle in his favor, while using his destructive abilities to tear apart various regions of the land. Eventually, the fray makes its way to the Valley of Bowser entrance in the center of Dinosaur Land, and a waterspout is later created by Metal Sonic, which sucks up the surrounding rocks and everything else around it—though everyone manages to enter the collapsing gateway before the waterspout can reach them.

Mario, Luigi, and Yoshi return here five years later, to investigate the Destruction of the Valley of Bowser ; upon arrival, however, they are unexpectedly ambushed by the perpetrator, Gemerl the android. A fierce battle occurs, with the three fighting for their lives against Gemerl, who promptly lays waste to everything around him as he fights his opponents (under the remote influence of the supercomputer GAMP). Nearly all the various regions of Dinosaur Land fall victim to the destructive brawl, including the hilltop of Vanilla Dome, where the alliance keeps the battle restricted for a while. Chocolate Island is where Zim finally silences Gemerl, using his Irken handgun, leaving the android to rust in the water. However, two separate groups of foes arrive not long afterward—namely, Mr. D and his henchmen, along with Tak and the Xevians—all of whom essentially become responsible for Dinosaur Land's Downfall, in which SOL towers engulf the entire land, and the vast fleet of Toroids bomb everything on the surface.

Presumably, Dinosaur Land has been restored to its former state since then, as all of the other sites of GAMP's takeover have been.