A recent update on the Japan version of Tsum Tsum has added the ability to see if your current MyTsum is valid for the attempted mission in Bingo Cards and Event Missions. It also will provide a list of eligible Tsums for that particular mission. So, as I make my way through the various lists, I'll be slowly updating the Attributes lists with the correct Tsums. Currently, they are mostly correct, most of the lists will probably be missing a few or have a few Tsum Tsums that aren't valid. I'll be starting with the Initial lists, so those will be the first to be officially accurate. But the complete update will take a while to complete.
Noted, that there will still be some unofficial lists on the Wiki, because they're not currently a used category. Most notably will the initials. Only a few initial missions are actually used in the game. They're on the Wiki in the event that they do actually end up using that initial as a mission. It'll save editing time down the road.