I was talking to a friend on another forum, and this seems like a pretty solid move idea. A specially-based move that always gets critical hits. As such, it would have to have a low base power (30 or 35?), but in turn, it puts all those damn CMers in their place. My proposed move was:
[insert name here]
35 Base Power (effectively 70, which is less than Dark Pulse), Dark-type Special
Critical hit chance (100%).
As long as we don't give it to a Pokemon that can get STAB (No Darkrai. Absol won't make much use of it. Maybe TTar can, so lower the BP to 30, but that doesn't change all too much.), it shouldn't be broken. And considering it's Dark-type, it gets neutral damage on all CMers, and super-effective damage on some (Celebi, I am looking at you).
And hell, it would even make that one Pokemon with Anger Point a bit more viable, because he has something to switch into for free Belly Drum boost at less HP cost.
I suggested a move that always gets crits about a hundered pages back but I made it Fighting with 50 Base (so effectively 100). It wouldn't be broken even with that much power because it's essentially an Earthquake that can't get crits. Since there aren't any Dark moves that have over 80 Base Power, you could make it 40 or 45 (and give it essentially 80 or 90) which would make it more viable, and people won't neccesarily use it simple because it can take out Calm Minders. Roar and Taunt already do that and they're not used to counter them.
STAB isn't a problem since it won't be much more powerful than Dark Pulse. The only problem you could have with it is if a Pokemon with Technician gets it. It would essentially be a perfect accuracy Fire Blast.