Introduction
Welcome to the world of Gudetama! This instruction manual provides essential information for setting up, operating, and maintaining your Tamagotchi Gudetama Virtual Pet, Model 42821. Follow these guidelines to ensure a fun and engaging experience as you raise and care for your very own lazy egg.
Safety Information
WARNING: CHOKING HAZARD - Small parts. Not suitable for children under 3 years due to small components that could be swallowed.
This product is recommended for ages 8 and up. Adult supervision is advised for younger users, especially during battery installation.
Package Contents
Please verify that all items are present in your package:
- 1 x Tamagotchi Gudetama Virtual Pet with Keychain
- 2 x LR44 Batteries (pre-installed or included separately)
Setup
Battery Installation
Your Tamagotchi Gudetama requires two LR44 batteries. These may be pre-installed with a pull tab to prevent discharge. If not, or if replacement is needed:
- Locate the battery compartment on the back of the device.
- Using a small Phillips head screwdriver (not included), open the battery compartment cover.
- Insert two new LR44 batteries, ensuring correct polarity (+/-).
- Replace the battery compartment cover and secure it with the screw.
Initial Activation
After battery installation, pull the plastic tab (if present) or press the reset button on the back of the device using a thin object like a pen tip. This will initiate the device and display the initial egg.

Image: The Tamagotchi Gudetama virtual pet in its yellow packaging. The packaging indicates that 2 LR44 batteries are included and provides safety warnings. The device itself is yellow with a small screen displaying 'meh..' and Gudetama's face.
Operating Your Gudetama Virtual Pet
Hatching Your Gudetama
Once activated, your device will display an egg. Over a short period, the egg will hatch into a baby Gudetama. Pay attention to the screen for the hatching animation.

Image: A section of the Tamagotchi Gudetama packaging illustrating the hatching process, with a cracked egg revealing a small Gudetama character.
Basic Care and Interaction
To keep your Gudetama happy and healthy, you must provide regular care:
- Feeding: Gudetama needs to be fed. Use the device's buttons to navigate to the feeding option. You can offer it soy sauce or a tomato.
- Playing: Engage with Gudetama by playing mini-games. This helps to keep its mood up.
- Attention: Respond to Gudetama's calls for attention promptly. Neglect can lead to undesirable outcomes.

Image: A section of the Tamagotchi Gudetama packaging illustrating Gudetama being fed a bottle of soy sauce, labeled 'FEED'.
Evolution and Outcomes
The way you care for your Gudetama will influence its evolution. Different care patterns can lead to various versions of Gudetama. However, if Gudetama is neglected, it may turn into an egg dish, requiring you to start over from a new egg.

Image: A section of the Tamagotchi Gudetama packaging illustrating Gudetama transformed into an egg dish, with text indicating this outcome.
Controls
Your Tamagotchi Gudetama device typically features three buttons (A, B, C) on the front for navigation and interaction, and a reset button on the back.
- Button A: Selects options or confirms actions.
- Button B: Cancels actions or returns to the previous screen.
- Button C: Scrolls through menu options.
- Reset Button: Located on the back. Use a thin object to press it for a full device reset.
Sound Settings
You can toggle the sound on or off. Typically, pressing Button A and Button C simultaneously will mute or unmute the device. Refer to on-screen prompts for specific instructions.
Maintenance
Battery Replacement
When the screen dims or the device becomes unresponsive, it's time to replace the batteries. Follow the battery installation steps outlined in the Setup section.
Cleaning
Wipe the device with a soft, dry cloth. Do not use liquid cleaners or immerse the device in water.
Troubleshooting
- Device Not Turning On: Ensure batteries are correctly installed and fully charged. Try pressing the reset button.
- Screen is Dim/Unresponsive: Replace batteries.
- Gudetama is Not Responding: Check its status. It might be sleeping or in a specific state. If issues persist, try a soft reset (if available) or a full reset.
- Accidental Reset: If the device resets unexpectedly, ensure the reset button is not being accidentally pressed.
Specifications
| Model Number | 42821 |
| Brand | Tamagotchi (Bandai) |
| Item Dimensions | 0.98 x 1.38 x 1.57 inches |
| Color | Yellow |
| Batteries Required | 2 x LR44 (Included) |
| Recommended Age | 8 years and up |
Warranty and Support
For warranty information or technical support, please refer to the manufacturer's official website or contact Bandai customer service directly. Keep your purchase receipt as proof of purchase.
Manufacturer: Bandai







