where to find all 'secret' bd opponents?

[invisible]

I've been on Neopets for over 3 years now and I've been poking around on here for a while as well. I give BD a shot every now and then. So I went to the 'Opponents found' page and it says that there are 50 secret characters. Does anyone know where I can find them all? I have 32 of them but I was just curious as to where the rest can be found.

[Shadow of Life]

http://idb.finalhit.org/?searchtype=oneplayer Which ever one you want to know to get click the name and then look at the box by its picture.