The Mimic Shop idea reminds me a lot of Spamton's Shop in Deltarune and the Medina Village in Chrono Trigger.
The Mimic Party member thing happens basically word for word in Mother 3 during the Tanetane Island Hallucination event.
Doesn't Undertale also do the fake save point thing twice? Once in the True Lab with Lemon Bread and once in a cutscene right before the Neutral Route's final boss.
Your fake menu screen idea also reminded me of Undertale tbh.
I have never seen Mimic Weapons/Armor, but it sounds like a cool...
I'm mostly annoyed by the fact that the characters that are supposed to be identical to real humans sometimes have hair colors that don't make sense without any explanation.
Might as well make them a different race or something to differentiate them from real humans at that point.
Not that this...
I honestly hate when characters have hair colors that don't make sense for humans to naturally have without any explanation.
If you're gonna make characters with unnatural hair colors at least explain that it's dyed or that they aren't human and are another race or something.