How do I become a zombie so I can go into the Zombie Den?

you had to have gotten a disease in the event either this year or last year

unfortunately, now you can't unless they decide to have that be a part of a event next year

:D

Awww. Darn. Well thank you. :3

@ Kiotochi

Really?

@`Foxy You missed the event. Hopefully they'll do it next year too so you can become a zombie! :D I can get something there if you would like. :)