FirebrandX's NES Composite Palette Project documents years of work trying to reproduce the colors of original Nintendo hardware across CRTs, emulators, RGB mods, and modern displays. The problem is much messier than picking 64 nice colors.
F-Zero World Record History tracks course and lap records across four F-Zero games, preserving modern video-backed runs alongside records traced back to Japanese magazine-era performances from 1991 and 1992.
Nintendo's surviving Japanese Super Mario 64 page promoted the 1996 game with story text, screenshots, highlight scenes, and a wonderfully honest admission that the Internet could not really communicate what 3D Mario felt like.
Club Nintendo Archives documents Nintendo's little-remembered UK promotional magazine from the early 1990s with issue indexes, game appearances, articles, regional naming notes, collector research, and downloadable scans.
The Yoshi Clubhouse is a deliberately old-school Nintendo fan site full of character pages, pictures, music, updates, and the sort of unapologetic enthusiasm modern platforms tend to flatten.
BMH Computers' Gamer's Paradise was a hand-built video game site by Bill Hensley, with individual Nintendo game pages that still leave traces in old search indexes.
NES City is a surviving early-2000s Nintendo fan site whose update archive still preserves AIM icons, desktop wallpapers, IRC rooms, RSS experiments, fan shrines, and the small-site culture around the NES revival.
A surviving Kids Web Japan article from the late 1990s captures Pokémon while it was still a fast-growing Japanese Game Boy craze, complete with link cables, stamp rallies and 151 monsters.