Can you elaborate a bit more?  I don't quite understand.  What variants?  And where do you want me to put them?

Added now.

https://www.pricecharting.com/game/atari-2600/activision-decathlon

I've added this now.

https://www.pricecharting.com/game/jp-nintendo-ds/subarashiki-kono-sekai

That was added to Amiga CD32.

https://www.pricecharting.com/game/amiga-cd32/microcosm

You can add these games now.

https://www.pricecharting.com/console/tiger-r-zone

I've fixed as many of these as I could identify.

That will be in the menu with the next server update.

All that I've found have been moved.  The site won't show the update for about 12 hours.

I've added backend support for these figures now.  Please add any figures you want us to start tracking by using the "Add Product" tool.  We will start looking for those sales and calculate a price automatically after they have been added.

https://www.pricecharting.com/console/rumble-u