To find most of the items included enter the basement in sanctuary hills! 

To spawn the items in type:

Help "Mae" 0 ----- For all Mae related items 
Help "Asr" 0 ----- For all Asriel related items 
Help "Knife" 0 ----- For the "True Knife"
Help "Mosin" ----- For the Mosin9130


Do not expect updates, I am not very experienced and are only putting this work up because no one else has done it.