Have multiple Tamas - different versions? Or maybe like us, you have friends you Tamas that at a lower or higher version and of course, we want to connect/play/add them as friends!
Here's a fantastic chart from Tama-Zone showing which Tamagotchi versions connect with what and whether they can have children (breed).
Based on actual experience, leave feedback in the Tama-zone forum if you have any problems or corrections.
