Ichigotchi on v4 (and v4.5?? I don't know) and Ura Young Violetchi on v4.5. And I think Kuchipatchi on v3 can go down to 0lb too. FYI: On v4 and 4.5, the normal base weight for babies is 5 lbs, 10 lbs for toddlers, teenagers are 15 or 20 lbs, and for adults, 20 or 30 lbs.