From Bulbapedia, the community-driven Pokémon encyclopedia.
Two magnets in their packaging
Pokémon magnets are a product manufactured by Much Magnets in 1999. The magnets are half an inch thick and feature the likenesses of several different Generation I Pokémon as well has human characters from the anime. The magnets were sold in 18 fixed packs of two each, with 36 magnets available in total.