Board Thread:Questions and Answers/@comment-35069421-20190910152145

Hey I couldn’t really find a lot of info about what this compatibility is. (It talks about compatibility on the trivia section of Endou Mamoru Densetsu and I think also in the 2012 Nintendo direct) I guess it unlocks new characters and such but I am not sure, so can anyone shed any light on this for me? Would be highly appreciated (also if I missed it somewhere completely obvious please let me know) 