Board Thread:General Discussion/@comment-26180030-20181024140209/@comment-27123436-20181024204605

If he was using the actual Sans as avatar, that't be 8-C, but AUs have their own hierarchy and worlds that unify EVERY SINGLE AU there is into one big multiverse, and said multiverse has explicit higher-dimensions (Omega Timeline) and higher-dimensional beings (CORE!Frisk).