DELETE undertale.ini and file0 in C:\Users\[USERNAME]\AppData\Local\UNDERTALE
THEN PUT those files
 
WHAT DO IS CHANGED?
1,5%damage
1,1%Defense

temy armor and worn dagger at the beggining 
3pies
1 snail pie
and a few surprizes in your inventory :)

dimensional boxes A & B at the beggining