The character list for the Pix hasn't been fully revealed, but the tamagotchi website has unlisted images for some existing characters that haven't appeared in promotional material yet. They're for the characters page, but haven't been added yet.
https://tamagotchi.com/wp-content/uploads/ginjirotchi.jpghttps://tamagotchi.com/wp-content/uploads/charatchi.jpghttps://tamagotchi.com/wp-content/uploads/kuromametchi.jpgThere's probably more, but I don't think there's a way to view the directory so you just have to guess names and see if they have files uploaded. But at least one has a typo (momotchii) and some characters that have appeared don't have an image uploaded yet
