Osutchi[]
| Name | Photo | Description | Notes |
|---|---|---|---|
| Blue | 
|
Blue shell with yellow buttons. Printed white speech bubbles with black text reading "Hello", "Hey!!", and "Gotch". | Wave 1 (December 1997). Test models released earlier used this shell. |
| Smoke | 
|
Translucent black shell with translucent cap and white buttons. | Wave 1 (December 1997). |
| White and Green | 
|
White shell with green cap, logo, borders and buttons. Printed scattered green stars and two Tamagotchi characters on either side of the logo. Printed green ♂ on the cap. | Wave 1 (December 1997). |
| White Heart | 
|
White shell with light blue cap, light blue borders, and yellow buttons. Printed pink, green, blue, and purple hearts, with a pair of hearts reading "Gotch Love" above the screen. | Wave 2 (April 1998). |
| Clear Green | 
|
Translucent lime green shell with green cap and buttons. | Wave 2 (April 1998). |
| 1st Anniversary Blue | 
|
Metallic blue shell with light blue cap and yellow buttons. Printed silver graphics including a birthday cake, "Happy Birthday Gotch!!", scattered stars, and two Tamagotchi characters. | Special edition shell celebrating Tamagotchi's 1st anniversary. 15,000 units produced. Came in a commemorative box bundled with the Mesutchi counterpart. |
| Test Model | 
|
White shell with light blue cap and yellow buttons. Printed blue ♂ top left of the screen. | Unreleased design. Used to test the marriage functionality. |
Mesutchi[]
| Name | Photo | Description | Notes |
|---|---|---|---|
| Pink | 
|
Pink shell with yellow buttons. Printed white speech bubbles with black text reading "Hello", "Hey!!", and "Gotch". | Wave 1 (December 1997). Test models released earlier used this shell. |
| Clear | 
|
Translucent shell with translucent black cap and black buttons. | Wave 1 (December 1997). |
| White and Orange | 
|
White shell with orange cap, logo, borders and buttons. Printed scattered orange hearts and two Tamagotchi characters on either side of the logo. Printed orange ♀ on the cap. | Wave 1 (December 1997). |
| Yellow Heart | 
|
Yellow shell with light pink cap, light pink borders, and white buttons. Printed pink, green, blue, and purple hearts, with a pair of hearts reading "Gotch Love" above the screen. | Wave 2 (April 1998). |
| Clear Orange | 
|
Translucent orange shell with orange cap and buttons. | Wave 2 (April 1998). |
| 1st Anniversary Pink | 
|
Metallic pink shell with yellow buttons. Printed silver graphics including a birthday cake, "Happy Birthday Gotch!!", scattered stars, and two Tamagotchi characters. | Special edition shell celebrating Tamagotchi's 1st anniversary. 15,000 units produced. Came in a commemorative box bundled with the Osutchi counterpart. |
| Test Model | 
|
White shell with pink cap and yellow buttons. Printed pink ♀ top left of the screen. | Unreleased design. Used to test the marriage functionality. |