Tom Nook is a main character of the Animal Crossing series. In the games, he is the owner of the shop in each town, and he also lends the player the money for a house, which he/she pays back throughout the course of the game.
Super Smash Bros. Melee
Tom Nook makes an appearance as a trophy in Melee. While playing in the English language, the game for the trophy is listed as "Future Release".
Trophy #264
Description
"This guy's the friendly neighborhood shopkeeper who kindly helps the player set up his or her first house. He has a nose for business, and his customer service is second to none. During the course of the game, his store starts as a corner shop, expands to become a convenience store, and finally becomes a thriving supermarket."
Super Smash Bros. Brawl
In the Animal Crossing-based Smashville stage, Tom Nook also makes an appearance in the background. He also appears as a trophy. It was speculated that he was going to be a character in Super Smash Bros. Brawl, but this was proven wrong when the game was released.