These are episodes/contests/game with different type of crime cases. Any one can try to find out ho is the one that killed the victom/s. The criminals are the aliens from different serieses on the Ben 10 Fan Fiction Wiki and are only used ONCE. (Twice including Ultimates). Since the aliens are from The wiki, it might be a little harder, but don't worry, i'll give hints, like maby the series used or a play on words, Good luck!
Idea got from[]
I got this idea from turu's origional B10: Detective Cases. I just added the use of B10FF Aliens.
Alien Perpetraiters (Can't be used again)[]
Case 1: LMN (BTMT)
Case 2: Diamondhead (Canon)
Cases[]
Case 1: Mall Security (Closed by Tyran Rex)
Case 2: Midnight Lake (Closed by Turu)