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I'm afraid I'm not familiar with that one, although it looks like the answer is right there in your link -- a fictional television series within a real television series. (Though I actually did watch Genshiken, which featured the fictional anime Kujibiki Unbalance. I've heard bad things, but, then, that one was depicted as being mediocre at best...)
Well, the title, according to the first line of the linked article, literally translates to Lunar Rabbit Weapon Mina. A brief summary of the story identifies some of its characters -- I assume those depicted at the top of the poster, though I could be wrong about that -- as being "rabbit-themed" transforming "henshin" girls. I'm not prepared to guess how the plot goes, based on the premise described a few paragraphs later, but they are certainly drawn in a "cute" manner like a bunny.
Also, this is either a particularly uncanny coincidence in a life full of them or are you somehow reading my self-addressed Facebook messages?
If you mean my favorite... it's difficult to pick one, but...
Skip Beat!, Death Note, the first season of Rozen Maiden, as in the first thirteen episodes, maybe Scrapped Princess... and it's mostly text, but I'd like to mention "Shadowjack Watches Sailor Moon". (It's been a while since I saw any of the anime itself. This guy's retellings start off funny and become something special.)
I'm also working on Cowboy Bebop, and it's been years since I saw Digimon.
The heroic alter ego of Usagi Tsukino as she defends Earth from encroaching evils, and, in a "meta" sense, a groundbreaking example of a magically-powered monster-trouncing heroine in the leading role.