Unused doll sprites (dec:76-81) (Ruby/Sapphire/Emerald)
Notes: You've probably seen these if using the very old map editing tool AdvanceMap, and they've likely been known about since long ago, but are not on The Cutting Room Floor for some reason. They can be found in Pokémon Ruby/Sapphire/Emerald where they are apparently unused, but I'm unsure if FireRed/LeafGreen has them. Lorelei has a collection of dolls in FireRed/LeafGreen, but these don't seem to be in the collection. https://www.youtube.com/watch?v=iaymdG8hX1I
The unused dolls are Natu, Magnemite, Squirtle, Wooper, Pikachu, Porygon2 (but from how I gather the items don't remain; only the sprites).
For reference, here is the list of event objects in the Pokémon Emerald disassembly. https://github.com/pret/pokeemerald/blob/8d29f65c6c7f34aa53ae2e7ae3e4f34a95025602/include/constants/event_objects.h