This page explains in detail the interactions between the Mario series and the Spirit Camera series.
Spirit Camera: The Cursed Memoir[]
Maya dressed as Peach.
January 12, 2012
Mario
Spirit Camera
One of the unlockable costumes for Maya, one of the main characters in the game, is Princess Peach's dress.
It's unlocked after beating all Battle Mode missions in Nightmare Mode. She can't wear it during Story Mode; it can only be viewed during Free Photography mode.
Note that this is the third Nintendo costume in the Project Zero universe, after Luigi's Costume and Samus' Zero Suit in Zero: Tsukihami no Kamen and before the Mario Bros. costumes in Project Zero 2: Wii Edition.
License[]
While developed by Tecmo Koei, Spirit Camera: The Cursed Memoir was licensed by Nintendo to be released on the Nintendo 3DS, so they could include references to the Mario series.