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The only ones I collected was the 'originals'. I lost interest when they went above the initial 150 pokedex.
I had a very large promotional Pikachu card and traded it for a pile of shinys. I wish I had kept it ☹️

No worries, the brand got you covered. So far cards are still being released. More than 10k cards on the market. Do you still have any of your first 150? Would be nice to see them!