No luck searching the thread either, which was supposed to so easy... nothing on 'cat wizard' or 'cat boss' that was related. *-edit - ok so 'cat WITCH' turned up a single relevant post, nearly a year old, and apparently according to that post the cat's name is Enit. So... yeah. Best tip I can give for the fight is staying very close to her when she flies up into the air... -*
When searching it can be helpful to search with fewer words (even a single one), unlike Google it searches for all words and doesn't exclude one if it thinks it is either wrong (something in the direction "Did you mean 'xyz'?") or if it doesn't find enough results.
You should have just searched for "cat" without "wizard", "boss" or "witch". And I also said that because I myself made posts about her.
Also, about the guide, if you know how the enemy looks like then I expected that you would have known that I meant "Enit", in this case she is a unique enemy which is why I thought it was obviously her (though I read that the character comes from some other game, which explains the name).
Another tip for this site, try to use quotes or mentions so people know (and the person themselves) that you mean that person, since your post is related to mine.