I made a Tamagotchi Pix Growth Chart! based on the information I could find on Tamagotchi Wiki. This isn't a complete growth chart, we don't know all of the adult characters yet,
Tama-Palace - Tamagotchi Blog & Fansite
Tamagotchi Smart Growth Chart – Fuzzy N Chic
Welcome to Gotchi Garden! ❀: iD L - Growth Chart
Tamagotchi Yasashii Growth Chart | Tamagotchi Forum
Tamagotchi id L Growth Chart Clipart. : r/tamagotchi