How to upset Tails
1. Damage machinery
2. Harm Cosmo
3. tell him he did good when he killed Cosmo using the cannon
4. steal the pot in which he planted the seed
5. invite him for food (to cheer him up), several times a week
6. point in a random direction and say "Look, a Metarex member" or "look, it's Shadow", then help whoever he's about to kill
7. put a gun in his hand (he hates the things you know)
8. follow him around town and renact the scenes where he killed Cosmo and when Sonic gave the seed to him
9. set him on a date with another girl other than Cosmo (E.G. Cream, Debbie, Ginger, Fiona, Wave)
10. sing a ghost related song with the help of either Sanguine, Charmy or Anita
11. remind him Shadow was right when he (Shadow) thought Cosmo was a spy
12. (if your Evil) create a robot clone of Cosmo
13. (if your Good) If he begins caring for said robot clone of Cosmo, destroy it!
14. send him back in time to when he killed Cosmo, eventually he will be in a straitjacket
15. tell him that Chris is Sonic's best friend
16. dress him up in geeky clothing
17. tell him he was mental in falling in love with a girl with flowers growing out of her head
18. destroy the memorial garden he built dedicated to Cosmo
19. insult Cosmo in front of him
20. force him to watch a ghost movie