Earth
The planet we're on. Was destroyed in at least two timelines.
In Member OG, the Western Hemisphere was destroyed by Lupus or something. But it got better. But then in Member OG 5: Secret of the Ooze, Akujin used an X-Bomb to blow up Earth so that he could search the rubble for the four stones that sealed away the Writer's Chair. He was unable to complete this task, as the OG Six kept him busy on Krad, and Earth was restored when BSD sacrificed himself to the Holy Plot Device (reverb). Most were unaware that the planet had even been destroyed.
Control of the planet was largely split between Team Rocket Omega in the Western Hemisphere and TWIFATIT in the Eastern Hemisphere. Following Lupus's death in Member OG 10: Full Circle and the subsequent collapse of his organization, the governments of Japan, Canada, Italy, Portugal, Venezuela, and the New Oceanic Republic joined forces as the United Super State Region (USSR). They formed a peacekeeping team with the help of refugee Kradians to retake the planet from TRO and other evil forces, but were probably collapsed when Lupus was resurrected and brought TWIFATIT back with him.
In The OGers: The Third Generation, TRO collapses when the OGers destroy their main headquarters and Magikoopa gives up his position. In the wake of their fall, TWIFATIT begins to claim their territory.
The setting of the Pikmin OG. According to Greg: "Plot twist. It was Earth all along!"