Well, theres already a Ranma 1/2 Touhou Opening. Really, what anime opening as Touhou NOT done? Even if it is a little choppy. Meirin was playing Ranma in it.
That's the thing about Rumiko-sensei's works, they're full of diverse and interesting characters.
Who would become the first and best Tsundere of all time, Akane?
My choices: Tewi as Nabiki. Kaguya as Kodachi. Eirin as Dr. Tofu. Wriggle as Konatsu. Mokou as Saffron. Alice as Gosunkugi. Yuuka as Herb. Marisa as Azusa. Meiling as Shampoo.
World Mei x Saku Theater
Little Wivesa pun of "World Masterpiece Theater Little Women"
"Sekai Meisaku Gekijo" - "Meisaku" (masterpiece) + "Mei x Saku"
"Ai no Wakakusa Monogatari" (Japanese title of "Little Women") - "Wakakusa" (young grass, implying little woman) + "Wakazuma" (little wife)