Inkopolis is a major city and a presumed city-state and the main setting of the Splatoon series. It is the primary home of the Inkling race. It can be accessed through a manhole located in the basement of Peach's Castle. In addition to Meggy, it is also Axol's hometown.
Mario ends up here while chasing Meggy in SMG4: If Mario Was In... Splatoon and serves as the main setting of that blooper as well as If Mario Was In... Splatoon 2 and the film SMG4 Movie: Meggy's Destiny.
Inkopolis residents, including Meggy, absolutely despise anime. At some point Axol was born in Inkopolis and began to have a talent for anime, but was driven away due to the town's hatred of it. The hatred of anime is further explained because it is a sign of discrimination towards humans, which most of anime is based on.
In 2018, Mario and Meggy trained again for the next competition but engaged a fight with Desti who wanted to recruit Mario (but failed because she kept getting Mario's name wrong).
In 2019, it served as the training grounds for Mario, Luigi and Tari in SMG4: Meggy's Bootcamp, where Meggy gave them intense training for the upcoming Splatfest. Their victory is cut short when Desti stole their weapons, and had to get it back in the next episode.
A week later, during the Splatfest Incident, Inklings started to disappear around the city due to the anime characters created by Francis who abducted them. As a result, the whole city was placed under wide lockdown to prevent further incidents.
The heart of Inkopolis, and also the hub of the first game. Many shops are set up in the area, including the Squid Sisters' studio. It also includes the large Inkopolis Tower, where Inklings head inside into the Battle Lobby to play in Turf War matches. The Inkopolis Plaza subway station is just south of the main plaza, and Meggy's Apartment is located further south.
Citizens of Inkopolis can get around the city at ease with two types of rapid transit systems. The first, a commuter train system connecting the suburbs and the Deepsea Metro, connecting the major areas of the city with 10 lines. Inkopolis Plaza subway station is an interchange with these two lines.