If you're looking for anime similar to Code Geass: Nunnally in Wonderland, you might like these titles. All recommendations are made by Anime-Planet users like you!
In feudal Japan, evil spirits known as mononoke plague both households and the countryside, leaving a trail of fear in their wake. One mysterious person has the power to slay the mononoke where they stand; he is known only as the Medicine Seller, and he vanquishes the mononoke using the power of his Exorcism Sword. However, in order to draw his sword he must first understand the Form, Truth and Reason of the mononoke. Armed with a sharp wit and keen intellect, the Medicine Seller wanders from place to place, striking down the mononoke in his wake.
Both follow the plot of fairy tales and make creative use of still frame art. Mononoke is intricate and heavily steeped in obscure culture; Nunnally has boob shots. Mononoke is beautiful and surreal in its use of its stylistic conventions; Nunnally is the result of the leftover budget from half a Code Geass episode.
Looking for a change, Mikado moves from the countryside to bustling Ikebukuro to attend the same high school as his best friend, Masaomi. Though navigating a new school and friendships can prove tough by itself, Mikado also finds an overwhelming number of new delights and dangers in the district he now calls home. From a friendly Russian sushi bar to the violent color gangs, to even an urban legend in the form of a black motorcycle rider, each resident of Ikebukuro is unique and frightening. But the town is smaller than it seems at first, and these strange events appear to be connected. Will the growing storm sweep up the transplanted country boy and his friends or will Mikado find himself at the center of a dramatic change for Tokyo?
Durarara is a modern urban fairy tale. It also actually has strong, complex characters, a mysterious and intricate setting, and something resembling a plot. It also actually a budget, with a variety of beautiful scenes and an excellent soundtrack. Go watch something worth your time instead of this.
Chihiro and her family are on their way to their new home, when they discover an abandoned amusement park. After Chihiro's family mysteriously turn into pigs, she is thrown into a surreal world of magic and fantasy. Join her as she struggles to survive in the bathhouse of the gods, ruled by an evil witch who has stolen not only her name, but her way back to the real world.
Kiba is a wolf, one of the last of his kind, and his dream is to find Paradise in a world torn asunder by war. Cheza, the legendary Flower Girl, can lead him to Paradise, but there are others who desire her, and help from other wolves at his side may not be enough. Driven by his noble spirit, he will not forsake his quest.
This recommendation is mainly tied around the 1st and 4th episodes of the Kuroshitsuji II specials. Nunnally in Wonderland basically sticks the Code Geass cast as characters in Alice in Wonderland. The two aforementioned episodes of the Kuroshitsuji II specials does exactly the same thing. Both of these specials are just fanciful stories where we get to see a familiar cast in a different light. (The other episodes of the Kuroshitsuji II special does this even more, but just not in a way that is as similar to Nunnally in Wonderland.)