what is junior going to do to sans?

Nice, cant wait too see more of this (that is if you are going to do more?) anyways im looking foward.

THIS IS SOOOO COOL! Please, please, please continue this story, I've been waiting for you to do undertale/grim tales crossover.

it could be gaster or one of the other 7 souls but that seems too easy. if this is a crossover it could be a grim adventures character. I could see Kare doing some evil shit like that.

I love it so far keep up the good work

I like it and I'm thinking this him and it are Grim and HIM and I'm going to love seeing Jr mess with everyone

Seems like an interesting start; I'm guessing that HIM will be involved somehow and look forward to seeing how Junior interacts with others... especially Sans and Papyrus.

gimp gimp gimp gimp gimp

Very interesting can't wait to find out what's brought Junior to the Underground.

Will any more Grim Tales characters appear in the Underground?

it was ok but i lilike your mlps and naruto better.

This is certainly interesting, though I'm not entirely sure what to think of it yet