It’s no secret that all kinds of fictional works change from their beginning to their final product. And a minor character in a classic video game embodies this very well. In the Kanto Pokemon games, Erika is the grass-type specialist leader of the Celadon City gym. Wearing traditional Japanese clothing, her characterization is that of a graceful flower lady (who has a tendency to fall asleep).
But apparently she wasn’t always that way. And some of the changes made to her were after her Gen I artwork had already been drawn.
Development and concepts assets that have emerged have shown a picture of the original Erika. She would have been placed in what would have been Lavender Town (which in the final version didn’t have a gym at all). And, unsurprisingly, she would have specialized in ghost types. The sole ghost specialist who actually emerged in Gen I was Agatha, portrayed as a normal person who just happened to use ghost types.
At least judging from her art design, Erika would, uh, not have been. Her eyes were closed and the Poke Ball in her sprite was in midair, which could be justified as her juggling it but which was likely meant to have her hovering it with supernatural powers. Finally, her clothes were folded in a way that was only used for the dead in her initial sprite. (A pretty big implication of this is that her design was changed in Yellow and all later appearances to be folded the correct way).
In other words, she was heavily implied just from the visual assets alone to be some kind of undead. Since no final text dialogue was made, there’s no 100% confirmation, but it’s pretty clear. Would this design carrying over really change much?
Probably not. Unlike a few other Gen I leaders, Erika did not become a superstar in her own right. At the time, not much would really change. Except for her prominence. See, spooky Lavender Town became a centerpiece of internet creepypasta campfire stories immediately. And having someone who was an outright zombie? Oh yeah, she’s definitely getting featured in them. So even if official media stays out, Erika the Zombie would become a star of the internet.
Since a multiverse canonically exists in Pokemon, Zombie Erika probably lives in some variant universe. Much as how creepy supernatural anime Sabrina exists alongside normal actress game Sabrina. Who knows, maybe this Erika starts conventional Fuldapocalypses as a hobby. Has the zombie sorceress been found?!?