Yup, that was it. Had a hard time finding it, but I have all achievements now!
Yup, I actually didn't get the achievement for finding her again.
Ive spoken to all the npcs multiple times. If you are referring to the invisible one above the blue stoompo, I got that.
I have all red tomato's and 5 blue tomato's, but I can find the last one. Is there any hint to locating it?