Smoke has one too, It's a 54% wall combo 0 meter, 64% 1 meter, and if the reset connects its 100% for 2 meter. but it's not practical in the slightest
Here's a video of it
In order for it to work, You have to time (and I mean MASH OUT) a dash xx uppercut right after his 3d12 launcher. I've been told this combo is not Sheeva specific, however I've only tried it one time and it was on Sheeva so I can't confirm/deny that. Suffice it to say that it's fucking hard, and there's no trick to make them easier. You just have an absurdly small window of opportunity to convert the combo.
Honestly I think Rain's the only one with a reliable uppercut combo, but I could be completely wrong.