Are you talking about a Hanatchi? A tamagotchi with a big nose and three nosehairs, right?
?_?
I know I've had a Hanatchi because it was the first one I got. I dunno, but I can tell you what me Hanatchi digivolved--ahh, I mean, evolved--from. This was how it digivolved--err, evolved.
Shiroteletchi ---> Mizutamatchi (looks like a raindrop/mochi on screen) ---> Piroriroritchi (looks like a black pikmin on screen) ---> Hanatchi
I just took really good care of it (the day I got my tamagotchi, I also had a four day weekend from school). I also kept it at minimum weight (yes, my tamagotchi are skinny. No wonder I couldn't beat bump!)