XOR is a special variation of Dee-Dee in Ultimate Custom Night that replaces Dee-Dee when playing 50/20 mode and, on very rare occasions, during normal gameplay. XOR shares her design with Dee-Dee, but with a greyscale color palette. Instead of pink, blue, and yellow, she is mostly grey and black.

Dee Dee, abbreviated as DD, is a Toy animatronic vendor who first debuted in FNaF World. XOR, commonly referred to as Shadow Dee Dee, is the Shadow counterpart of Dee Dee, debuting as an enemy in Ultimate Custom Night.

XOR, commonly referred to as Shadow Dee Dee, is the shadow counterpart of Dee Dee, debuting as an enemy in Ultimate Custom Night. She only appears in the 50/20 mode. XOR has empty eye-sockets and is monochrome colored, except for the red button on her propeller.

XOR, (or Shadow DeeDee by fans) is a shadow version of DeeDee that appears in Ultimate Custom Night in the 50/20 mode and rarely in regular modes. Unlike DeeDee, where she summons only one random character during the night, XOR summons all the characters present in DeeDee's roster.

Dee Dee, also known as XOR in her 50/20 mode form, is a supporting antagonist in the Five Nights at Freddy's franchise. She serves as a minor character in FNaF World, and the secondary antagonist of Ultimate Custom Night.

XOR, also known as Shadow Dee Dee or simply Shadow DD, is a mysterious and unsettling character within the Five Nights at Freddy’s series. As a shadowy counterpart to Dee Dee, XOR represents the darker, more malevolent aspects of her character, embodying the themes of hidden dangers and unpredictability that are central to the FNaF universe.

XOR is the shadow counterpart of Dee Dee, originating in FNAF World. XOR returns in Ultimate Custom Night as an antagonist that does not kill you, but will try to get you killed. XOR can either spawn with a very low chance (unknown) or will spawn if …

XOR is an alternative version of DD, which is guaranteed to spawn in 50/20 mode, and has a rare possibility to spawn outside of 50/20 mode as well. Her appearance is a completely monochrome version of DD with backed out eyes, the only color apparent being …

XOR is guaranteed to appear during 50/20 mode, no matter what, and she will always summon all of the animatronics on DeeDee's special roster. I assume that's what she does outside of 50/20 mode too, but I'm not sure.

X.O.R. also known as Shadow Dee Dee, appears in 50/20 mode instead of Dee Dee, and will summon all of the secret animatronics.