Add more Digimon cards

I have multiple cards from Digimon, e.g. 1999 MetalGreymon that I would love to be able to add in my collection in pricecharting. I was thinking of helping out by adding it myself but no set for Digimon is in the dropdown list for sets even though they exist in Pricecharting.
But there are also other Digimon cards I am missing that i would love to be able to add.