Board Thread:General Discussion/@comment-28224025-20170706210248/@comment-25660371-20170725070745

Not every series has manga before the anime. For example rezero, but that is based on a novel, kiznaiver, dbsuper.

Also the Inazuma manga is not always on the same page with the anime or the games. The games are mostly canon. But they usually air in the winter or at the middle of the anime (except for the first game, that hype is what started the anime).