I have not seen a weight chart. There isn't any specific weight your Tamagotchi has to be but usually there is a minimum weight they could end up at. You can find out what it is by playing games with it (the weight decreases by one, I believe, everytime you play one game) until it refuses to play games anymore...you'll know. It will shake it's head and then you'll have to feed it to make it gain weight so you can play again. All in all, there is no specific weight, really, when it comes to trying to get a specific character. At least in my opinion, it doesn't. I just try to make my best judgement as to what the wieght should be. Just don't starve it and don't overdo it either...just like a real pet! Don't quote me on this...I don't know much about the Connections yet, having only played with a V4 a couple of times and only getting down the general stuff. My specialty is with the Tamagotchi that came out in the 90s ("ancestors"). Hope this helps!