I got the special attack the very first time I used him...I didn't realize the odds on it until after I had him attack a few times...and he only did one point of damage...lol. Thought I could use him to destroy every enemy I used him on...
I got the ach on the first battle after you get T. Kemper (2nd playthrough)...you can't die in this training fight so get the enemies down to only a few hits and just block or ignore damage until you can have the cat finish a victim(I had to use his attack 4 times...it takes about 3 minutes for the attack to recharge)
Lets play...stump the Oblivion Guru, ask away...