I unlocked Ishizu at the Gate in Duel Links by summoning 200 Light Monsters! She has magenta eyes this time. ^^
Ishizu: … … … … … … I did not think I would ever stand on the battlefield again. This is most unexpected, Kaiba. And why do I have this Millennium Necklace? I gave it to Yugi during Battle City… Can it be that this world has recreated my abilities that I had during Battle City? If this world is a recreation… Does that mean Marik is here as well? Kaiba, must I relive the horrors I faced back then?