Home Regions allows you to designate homeless townies as locals in any World you want them to show up in. This can be a Sim you’ve made and evicted, or a Sim randomly generated by the game who you like and want to see around. 

There are two ways to do it. First, with testingcheats on, shift-click on the Sim you want to move. You will see a “Move Townie To…” menu. Click that, and you’ll see a menu full of all the different Worlds you have available based on your installed packs. Select any of those Worlds, and the townie you clicked on and their entire household will “move” to that World. You’ll start seeing them as walkbys, customers, and vendors there immediately.

When selecting a World from the pie menu, Residential Worlds show up first, then Destination Worlds, then Hidden Worlds. You can also assign Sims to Nowhere. Any townies living Nowhere won’t show up to any situation or background event anywhere that requires a local Sim, and will only occasionally show up when a soft filter or tourist exception allows them in.

The second method, which is useful for Sims who aren’t present on the lot and for moving many Sims at once, is to shift-click the ground. It can be any empty space on the ground or on the floor in your home. Similar to before, you’ll see a “Move Townies To…” menu. Click that and then the World you want to move Sims to, and you’ll see a pop up menu that allows you to select multiple Sims.

The menu contains all valid townies in your save file. It won’t show any townies who already live in that World, any Sims who live in a house, or special Sims who shouldn’t live anywhere (e.g. the Grim Reaper). Pick as many Sims as you want on this menu, and hit the checkmark. Then, all the Sims you selected and their household members will “move” to that World. You’ll start seeing them as walkbys, customers, and vendors there immediately.