There are no shop cheats, unlock codes, or hidden menus for the original 1996 Tamagotchi (Gen 1 / P1/P2).
Why
Hardware Limits: 4-bit CPU (General Instrument), 1.5 KB ROM, 64 bytes RAM. No space for hidden code paths.
Design Philosophy: Bandai intended a pure caregiving loop: feed, clean, play, discipline, sleep. No shortcuts.
No Data Port: Infrared (Gen 2+) or NFC (modern) for connection only – no debug/cheat interface.
Legit "Pro Tips" for Gen 1
Perfect Care = Secret Characters: Consistently full hearts (Hunger/Happy), immediate discipline calls, no sickness, lights off at bedtime → unlocks Mametchi (good) or Kuchipatchi (bad care) etc. The "cheat" is discipline.
Time Skip (Risky): Advance system clock → Tamagotchi ages faster. Can cause missed calls, death. Not recommended.
Pause Trick: Press A + C (or A+B on some) at main screen → pauses animation (saves battery, stops calls). Not a cheat, just pause.
Battery Pull: Removing battery resets to egg (loss of progress). Not a cheat.
Later Models with "Shop" Features
Tamagotchi Connection (V3–V6, 2004–2007): Infrared shop (buy items with Gotchi points). No cheats – earn points via games.
Tamagotchi On / Meets / Pix / Smart: NFC/App shop. Items unlock via gameplay, codes from promotions, or NFC tags. No universal cheat codes.
Bottom Line: Gen 1 is a sealed, deterministic virtual pet. The only "cheat" is perfect, attentive care. Embrace the beep!