To get into the equivalent of pokemon hell its actually easy, first go in the safari zone, leave very fast. Then the dude will ask you if you wanna leave early say no. Then re enter safari zone, save your game, turn it off, turn it back on, then try to leave again....you will be asked to buy time again say no, and leave the building. Fly anywhere walk for 500 steps, you hear the ding dong, youll be back to safari city.
Be sure to bring a pokemon with fly or don't save here or you will be stuck here forever👽👽👽👽👽
Let me know what you find, or if you want to see a video of me going through this....