How to get K.K. Slider or Tom Nook to visit 

Animal Crossing: Pocket Camp is now available in Australasia and the game has an option to make K.K. Slider and Tom Nook to show up and hang out at your campsite via crafting a chair for either of them. Each chair costs 250 Leaf Tickets that can be purchased (or earned) in-game. Both chairs are available for 45 days only although may reappear at a later date. It is expected that both characters will make an appearance upon worldwide release.