Quoted By:
>Work Up
>Removes negative stat changes to Atk and SpA before boosting
If you're at +0, you end with +1/+1
If you got intimidated, you refresh back to +0 then end with +1/+1
If you blew something open with a Draco Meteor and are at -2, you refresh back to +0 then end with +1/+1 so you can blow the next thing up even harder.
"Removes negative stat changes" is a really, really shitty Z-move effect, but as the side effect of a regular boosting move it's alright. Work Up is already garbage enough as it is.