User blog comment:UniverseAwesome777/Super Smash Bros. Ultimate Tournament: Coming Soon/@comment-30635962-20181025122515/@comment-37388005-20181108024858

Actually, Dialga appears in Brawl, as a stage hazzard on the Spear Pillar stage. Im pretty sure Universe didnt say anything about having any stage hazzard characters in here, so I think its legal. Heres a picture.