Continuing to document as much of the journey of making Princéton: Bluff Version as I can, let's look at the Hellman Sister's Boating Emporium. (see previous entries here.)
The shop itself is made using the Pokémart font which is pretty obvious to see. After a lot of trial and error, it ended up being easiest to have the two hellman sisters actually be one object with multiple different states depending on which switches are on. So, when you first load the room, neither switch is on; when you first speak to a sister, she panics and leaves, switch A on. She then comes back, and if/when you speak to her again, has a shop menu available, featuring the mayonnaise potion, lemonade (some citrus!) and Escape Rope, a necessary item for the heist (because you need to escape with the watches somehow!). Then, she leaves, switching A off and B on, which causes the other sisterself to walk back down to the counter. The second sister sells Dive Balls, but keeps the mayonnaise hidden away; then she leaves, swapping B off and A on, and the cycle repeats.
The way this works is by having the "default move route" (you can think of this as an automatic moveset, a looping or non-looping path like "look up and down" or "walk three left and then three right") for each of the B-on and A-on sisters be to move straight down, and then having the counter be opaque to them so they'll stop trying to walk there. So the moving up spaces spelled out is temporary, then the route flops and the next script to move up doesn't activate until after Pomp talks to them again. This hopefully captured the "flightiness" of the two sauce-y sisters.
Fun trivia: because I did my best to use existing sprites as much as possible, I didn't have a "curtain to the backroom" tile available in the Poké Mart font, for the sisters to go up through when it looks like they're leaving the map. When you leave the boat shop, you actually go one tile further than normal; this is because the tile in the center bottom of the red enter/exit map is actually also used for the backroom exit in the upper left. In order for the sisters to go through, it has to be "transparent" to figures, and so instead of stopping on the mat, Pomp also goes through an identical tile on exiting as well!