I was wondering one which ones were now available and which ones were retired. A specific one in general. Blob Kitty. Thanks.

Locking this board. MCT previews and info board

Also, if you have a spare MCT, you can click to open it, and it'll show you which ones are available (you don't have to select anything). If you don't have a spare MCT, that board has the word (RETIRED) after the retired sets c: