Hello!
For the Pokemon Periwinkle guide, it says that a Trade Stone is needed to evolve the trade evolutions (Haunter, Graveler, etc)
https://github.com/RetroAchievements/guides/wiki/Pokemon-Periwinkle-(Game-Boy)
As far as I can tell, that item does not exist in the game. However - they do evolve if you get them to level 36.
I'm not sure how much of the other information might need to be adjusted as well, but anything that mentions a Trade Stone is wrong for sure.
Hello!
For the Pokemon Periwinkle guide, it says that a Trade Stone is needed to evolve the trade evolutions (Haunter, Graveler, etc)
https://github.com/RetroAchievements/guides/wiki/Pokemon-Periwinkle-(Game-Boy)
As far as I can tell, that item does not exist in the game. However - they do evolve if you get them to level 36.
I'm not sure how much of the other information might need to be adjusted as well, but anything that mentions a Trade Stone is wrong for sure.