Doppelganger (disambiguation)

Doppelganger mat refer to any of the following:
 * Doppelganger: A card in the OCG and TCG.
 * Doppel-ganger: A monster hologram that Seto Kaiba used in artificial Shaodow Games.
 * Mimicat': A card, known as Doppelganger in the manga and anime.
 * Greenkappa: A card, known as Doppelganger in the Japanese version.