These pets all run the same. The 8-in-1 Zoo Zone used to be unique until all of the others recently came out.

The 8-in-1 Zoo Zone was also packaged and sold as  Octogotchi.

The functions are:  Feed, play, music (singing?), game (roll the die), dance, cleanup, sick care, age/weight, lights and attention.

This is the only multi-pet that is nothing like Gyaoppi. The meters are shown as the icon is lit. The games are unique too.

The screen is also nice and bright.

Lotsa Pets

Choose from three.

Penguin, bear and Puppy.

All the regular care.

I got this one so long ago, I barely remember it.

I'll have to take it out again some time.

Gyaoppi 8-in-1, 9-in-1 and the 10-in-1 above.

The growth chart has some interesting twists. See here.

Some of he features of the Gyaoppi pets are:

"Pause Button" that allows pausing the pet while you are at school or doing other activities where you cannot attend to the pet for more than an hour.

Fast Growth - allows the pet to be rapidly "aged" to a later state.  An alarm clock.