Board Thread:General Discussion/@comment-30088034-20170211001105/@comment-32182236-20180608202729

Plus, the kill count doesn't go up after killing Sans, and we're awarded no EXP for killing Asgore. We do gain EXP for Sans, but that's because we also participated in the fight BEFORE Chara killed him-When two members of a party fight together to beat someone, experience is split between them in most games. So, in Hndertale, the same applies with EXP.