Umbreon seems like the only one, currently.
Why Shadow Ball on Umbreon? Is it because of the Sp. Def lowering? That's down to chance to begin with, and most Umbreons would prepare to switch out after something like that. Not to mention, I'm worried about what Rotom-H's performance would be for the rest of the battle after that. Unlike Rotom-W, Rotom-H has more than one weakness to worry about when battling, which is why I gave it Choice Scarf to begin with: to outspeed pokemon that might be a threat to it. It's synergy with Cradily would also deplete, although I admit in just one battle that isn't as much of an issue. Also, if I kept Shadow Ball, I'd be worried about replacing HP Grass with Trick. Sceptile is upfront when it says "yo, I have Grass so I shut down all yer stuff like Gigalith and Rhyperior", meaning that the opponent would be likely to switch out on him. If I wanted to keep a surprise factor due to not always wanted to predict enemy moves like crazy, HP Grass is the only other way on my team to do so. Oh, and before you point out Carracosta, it's useless while it's still slow. Using Sturdy because of a Rock pokemon that could otherwise be easily defeated by Sceptile, or said HP Grass, is kind of a waste.
Trick sounds like it could definetely be effective, but I think I'm sticking to my current moveset. I'm sticking to Cofagrigus to scout out enemy Umbreons. Not to mention, using Carracosta as a shell smasher when Umbreon is could be a great idea. It'd waste Toxic while I set up, and then use a move to destroy it, even after a protect.
Although I'll admit, Umbreon now seems like a threat in general. Thanks for the reminder.