I never see any of these here on Reddit. Is no one interested in them? Feel free to show yours if you have any!
They are from the Japanese Pokémon Center, where they go for around 200 yen ($1.3) a piece. Way cheaper than the equivalent metal pins they sell on the US Pokémon Center for $10(!) a piece.
(The middle row and Gardevoir nr 2 from the left are fairly new, while the rest range between 10 and 14 years old.)
by Zeruel1234