Every single character in Undertale is changed while still remaining in the same basic story in some which way or form. AUs that only affect some of the characters are not found here. AUs that change only during the time Frisk is in the underground are not found in this category.
This category has the following 2 subcategories, out of 2 total.
Pages in category "Basic Change"
The following 61 pages are in this category, out of 61 total.