That's actually quite funny that I find this thread now, my Tama evolved into Leafichi this morning ^^
Uh... I don't know how I raised it... lol... I kept it close to me the entire time, I didn't let it get hungry at all, I always fed it and played with it.
Okay, my exact training methods (for all Tamagotchies, not just this one):
When they're a baby, make sure they don't get hungry. Check it every 10 minutes or so and make sure that all it's hearts are full. Also make sure you check back a lot 'cause it does a poop every 10 minutes or so. I always make sure that it doesn't fall asleep when it's done a poop (although if you do then you can't clean it, that lil' nap doesn't rely on the time, it's just what the baby does). Also, I always keep my baby on 30lb.
Soon, it'll evolve into your child. When it's at that stage, feed it a little until it's weight is 35lb. Keep your Tama with you all the time and make sure you check back on it. Make a note that it falls asleep, naturally, at 8PM and wakes up at 8AM, so make sure you've fed it and cleaned it; check up on it about 5 - 10 minutes before it falls asleep to make sure of that. Don't let your Tama sleep with poop and unfilled hearts. Also, when you're feeding it, make sure it doesn't exceed 35lb - in which case, play a game with it until it's weight is back where it should be, unless you plan to enter the "Bump" tournaments, in which case feed it heaps 'cause that game depends a fair bit on heavy weight.
When it evolves into a Teen in approx. 1 - 2 days time, change its weight to 40lb. Like earlier, just make sure that it doesn't fall asleep with a poop or empty hearts, and make sure it doesn't beep at you as best you can. A happy Tama is a Tama that can rely on you without needing to call at you. However, if it does beep and it's upset, however nothing seems to be wrong with it, praise it. But if it beeps and it's fine, give it a time out. That's how you get training points.
When it evolves, keep your weight on 45lbs. I don't know how I got Leafichi, but I did, so... yeah. I hope my strategy helped someone.
Mind you, I haven't bread him with anyone else, I reset my Tamagotchi actually. So it's got no parents other than... me. So I don't think the secret is in breeding...
Heh... this is funny! I always get leafitchis (or furawatchis) when my tama evolves! 
