Board Thread:General Discussion/@comment-36837442-20180906101831/@comment-36809985-20180906102934

If you didn't create a transfercode or have Facebook linking setup you are not going to be able to login.

That said, you can get your account back if you follow this guide:

https://old.reddit.com/r/DBZDokkanBattle/comments/6fk3fw/official_account_recovery_guide_both_versions/