These variants can be used officially in Duels.

“MANGA-STYLE Cards” are considered to be exactly the same as the regular versions of the cards with their existing names and you can have 3 copies in your Deck as per the “Cards with the same name” rule. They are treated as having the same Type, Attribute, Level, ATK and DEF as regular versions of the cards!

Dark Magician (MANGA-STYLE; Monochrome)

Dark Magician (MANGA-STYLE; Color)

Red-Eyes Black Dragon (MANGA-STYLE; Color)

Blue-Eyes White Dragon (MANGA-STYLE; Monochrome)

Blue-Eyes White Dragon (MANGA-STYLE; Color)

Source: YU-GI-OH!.jp