(Why I am I doing these all in seperate posts?) Woody's smarter, persumably has more experience (Since Birdo doesn't seem to actually fight besides in RPG where she had just hatched), has Higher stamina (Very high vs. High), and unlike against Goku here he could actually use his size to his advantage
Birdo will just go for projectiles as usual, which Woody can easily dodge thanks to his small size, after that, Birdo could go into other tactics, and likely time manip as a last resort, which would be effective.
Overall, Woody has some advantages, but so does Birdo.
So while Woody's regen negation is apparently not useful (I'm going through all the threads I used this for him on now), pretty sure Birdo's regeneration is only really against being crushed (Which Woody won't be doing)