I'm not big into anime, but my wife is and I want to find one for her. She doesn't remember much about it and what she remembers could be wrong. She thought it ended in Neko and had a character named battlr. It involved this character saying that all supernatural stuff can be explained with logic and a witch set up a game with him to see how much he could explain. She just told me about this today and I'd really like to find anything I could to help her out. Does anyone know what anime this is?

I'm absolutely positive its Umineko no Naku Koro Ni .^^

I Agree.
It's definitely Umineko no Naku koro Ni and the character she mentioned is Ushiromiya Battler

[ Edited Jun 27, 2016 ]