Discovered Easter Eggs

#430: Easter Egg: Please, Sir, We Want Some More Issues
#215: Easter Egg: What's Your Favourite Colour?
#408: Easter Egg: Pony Peril
#375: Easter Egg: Keep Your Hands Off Those Lucky Charms!
#77: Easter Egg: World to End, or Possibly Just Mark Anniversary
#78: Easter Egg: Should We Pull the Lever?
#622: Easter Egg: A Holiday Masquerade