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Good day, I would like to inform you that the anime label is added to denote the chronological order of the zero arc in the anime, we know it has a manga but for the anime viewers the zero arc happened after the tartaros arc while the manga readers knows that the avatar arc is the next arc after the tartaros arc and not the zero arc.LightningGeist 14:55, October 28, 2018 (UTC)
Thanks LightningGeist for confirming it to me, Now I understand why it has the anime label. (Sosuagwu17 (talk) 15:09, October 28, 2018 (UTC))