Alright. Now that I've had a day to doodle in class (grade 8 is easy), I have a few sketches of possible nooglevolutions (not a typo, just an awesome-ish word):

Sorry they're so poorly scanned, but what can you do (don't say scan it again).
Anyway, in the first one (Nooglaeus Predatorium), the creature has that kind of sucker mouth that's available from the beginning, as well as a tail with a (possibly) poisoned stinger. Also it has the standard (for me) chitinous shell and adorable anime eyes to lull the enemy into a false sense of safety (Awww... Its so *GHAAAH!!!* Thud.)
In the second one (Noogleus Herbivorous), it has become quadrupedal and has kept it's original pincer-mouth (could be used as tusks), as well as a smaller mouth on the inside, to rip up plants. Also it has the standard chitinous shell and adorable anime eyes, that make them too adorable to eat.