Pokémon Card★Web (Japanese, 2001)

A small oddity from October 2001: 48 cards, released only in Japan and sold only online, sitting in a cycle of its own rather than as part of a larger series. Dark Charizard, pictured, is among its holos. That online-only sale is the whole appeal. The set was never sold in shops, so it fills a gap no other early set can in a Japanese binder. Buy it for the history rather than for a run of new artwork, and expect to assemble it from singles rather than packs.