1. Replace the ketchup in his bottle with some of Papyrus's spaghetti sauce. Let him drink it.
2. Lock Papyrus and Mettaton in a bedroom together with him knowing.
3. For a surprise party, convince everyone to douse themselves in red paint (to represent "ketchup"). Surprise him while holding a knife.
4. When he says, "Knock knock." like as in a knock knock joke, answer: "Come in."
5. Don't follow him when he takes you to one of his "shortcuts". He'll have to come back and get you. Repeat this a few times until he has to actually walk there with you.
6. Invite everyone over for a first person shooter game. Keep killing EVERYONE except for him.
7. Put more than 30 hotdogs on your head.
8. When you talk to him, randomly snatch at the middle of his face and scream: "GOT YOUR NOSE!"
9. Give him a glass of milk... Goat's milk. 😏
10. Organize a get together with everyone and talk to him. It should go something like this:
You: Hi Sans! You excited?
Sans: Yeah! Definitely!
You: Cool! 'Cause they're all dead!
Sans: ...WHAT?!
You: ...Dead serious about having an awesome time!
Sans: Oh! Yeah...!
You: Yup! I actually killed them all.
Sans: YOU WHA-
You: ...with excitement about the party!
Sans: Y-yeah... Haha..!
You: I was really busy too. I mean, look at all of the dust on my hands! Whew! It took a lot of work.
Sans: !!!!
You: I had to dust the tables with Undyne and Alphys, and Undyne being really messy and all sometimes.
Sans: ...Y/N.
You: Well, I did gain a lot of LOVE... And affection for helping them out!
Sans: Y/N.
You: And all of the pain and suffering the other monsters had to go through because of me... I actually did organize this get together after all-
*Megalovania plays*
Sans: Y/N!!!! STOP!!!! *Lifts you up into the air*
You: So worth it!
