Talk:Ultimate Super Saiyan Super Saiyan 4 Goku/@comment-35365041-20180421093913/@comment-32271305-20180421094228

Because he's from the Baby Saga.

There are other cards, like STR SSJ Trunks, who are also from the Baby Saga, but for some reason they ended up in the Category. So I can only assume that they were worried about making they Category too strong, even though they then released much stronger Categories.