You used Ditto? o.o That was brave... Can I ask why? x3
Rotom's basically just an all-around decent attacker tbh. Its main attack is Volt Switch which does good damage to a lot of things. Other than that it's not all that different to Zappy :p I can help you test some stuff tomorrow if you want? ^^
I added Ditto, Gyarados, and kept Azelf cause I got tired of studying the game and wanted to test it. What I learned: I have no idea how to use Rotom. Gyarados I didn't even get to test since it was OHKOd and so was Azelf. Same goes with Ditto. haha.. So I'm still in the process..