In the Heroes in a Half-Shell! miniseries, Shredder and Krang try to take over the Earth with Shredder's Foot Soldiers and Krang's Stone Warriors, but at the ned they are defeated by the Ninja Turtles and the Technodrome is sent to Dimension X. Shredder eventually returns to Earth in Shredder while Bebop and Rocksteady are seen also having returned to Earth in Something Fishy Goes Down.
In The Lost World, Krang offers to lead Maligna to Earth if she sends him som of her children to fight the turtles on Hirobyl, and retrieve the Turnstone. Krang and Shredder are defeated, but Maligna forms an alliance with Null and they aren't defeated until the end of Terracide. During this time, Maligna and Null are fought off not only by the Ninja Turtles, but by the Mutanimals, operating from Brazil.
The Ninja Turtles and Splinter carry out many international travels, mostly to South America where they later team up with the Mutanimals, and Asia. The Ninja Turtles also visit Scotland in the Doomsday Hassle in Banshee Castle special issue.
In the future, Earth suffers from the effects of pollution. Global warming caused by the greenhouse effect, melting the polar icecaps, floods the streets of many coastal towns, including New York City. What once were streets are used as canals for boats, like in Venice. The water level raising also causes sewer rats to enter the residential houses. The younger Ninja Turtles witness this already when travelling forward in time at the end of Intergalactic Wrestling where Cudley the Cowlick accidentally brings them to the future, allowing them to witness it from a New York City rooftop. Cudley explains this is just a possible future.
In the even more distant future, Earth is known as Thanatia, and fairy-like creatures have evolved there. By the end of the Future Shark Trilogy, Armaggon ends up trapped there, and is seen sitting near the ruins of the Turtleco building.
- People's Republic of China
- Saudi Arabia
- South Africa