Please give me a link to your collection on the site and I'll look into this and fix it for you.

These cards have all been added now.  They will take about 24 hours to show up on the site.

https://www.pricecharting.com/console/amiibo-cards

Added.

https://www.pricecharting.com/game/jp-playstation-2/seiken-densetsu-4

All of these have been added now.

We've let users add the titles they want for the Japanese PC Engine releases.  If you know of a good database of these titles or you want to send me a spreadsheet with all of the missing titles, I will gladly import them to the site.  Thank you

Added now.

https://www.pricecharting.com/game/jp-psp/wangan-midnight-portable

Added.

https://www.pricecharting.com/game/jp-psp/me-&-my-katamari

Added.

https://www.pricecharting.com/game/jp-psp/ridge-racer

Added now.

https://www.pricecharting.com/game/jp-playstation-2/capcom-vs-snk-2-millionaire-fighting-2001-the-best

I've added this now.

https://www.pricecharting.com/game/jp-playstation-2/wangan-midnight