Restart to get Resstti at least 2 times. Then get a shovel and hit all the rocks in the town until one cracks hit it again and go in the hole. There you will find Mr. Resetti. This tip has been reported to work only with the Japanese version of the game.

Nook's Cranny expands just like in the GC version, into Nook 'n Go, Nookway, and eventually Nookington's, and with the final expansion comes the hair salon. You need to have spent 240,000 bells, and a visiting friend must have bought something from Nook to reach this stage.