Occasionally, a work will Hand Wave plotholes, inconsistencies and anachronisms with one simple statement: "A Wizard Did It."

Well, SOME works take this a step further, by introducing you to the exact wizard behind it. The Wizard that Did It, if you will.

Unmarked spoilers beyond, since this is generally a plot twist, with the exception of the trope namer.

Examples:

Anime and Manga

• Just about anything in Haruhi Suzumiya can be justified by Haruhi.

Film

• From The Matrix, the Architect is the specific program that created the Matrix, as well as the One, the human resistance, and all of the other programs, including the Oracle.

Tabletop Games

• Tzeentch is behind everything, even his own failures.
• The presence of Kaiju-sized animals in the Mystara setting is explained, in their monster descriptions, with the claim that they were created by the wizard Gargantua.

Video Games

• Team Fortress 2 introduced periphery character Merasmus (a centuries-old wizard who is the Soldier's roommate) just so there can be a Wizard to explain anything in The Verse that doesn't already have a wacky explanation.

Visual Novels

• From the When They Cry franchise, the respective Wizards that Did It prove to be Hanyuu and Bernkastel.

Web Comics

• Sarda from Eight Bit Theater serves as the Trope Namer. In addition, Red Mage and Black Mage apparently have the potential to serve as his successors.