Sonictchi

In 1998, Bandai released a Tamagotchi Game for the Sega Saturn, "Sega Saturn de Hakken!! Tamagotchi Park." This game has some secret characters, including a Tamagotchi nased on Sonic the Hedgehog called "Sonictchi." This Tamagotchi is pretty tricky to get.

I've made the following flowchart based on the Tamagotchi Fandom Wiki, to make it easier to understand the steps to getting Sonictchi.

Babytchi
⬇
always evolves
⬇
Marutchi
↙
Bad care
⬇
↘
Type one: 0 discipline mistakes and good care
Type two: 1+ discipline mistakes and good care
↘
Kuchitamatchi
⬇
Good care
⬇
Tamatchi
↙
1+ discipline mistakes and good care
⬇
⬇
Evolves from type two Tamatchi with 0 discipline mistakes and good care
⬇
↘
Evolves from type one Tamatchi with 0 discipline mistakes and good care A Tamatchi that wins all three contests and has full discipline, intelligence and power will evolve into the pink variant.
⬇
Maskutchi
Ginjirotchi
Mametchi
⬇
0 discipline mistakes and good care.
Cannot evolve into Oyajitchi while the first Maskutchi raised is still alive
⬇
⬇
⬇
Oyajitchi

⬇
⬇
⬇
⬇
⬇
⬇
Oyajitchi, pink Mametchi or orange Ginjirotchi lays a P2 egg, hatches from spotted eggs
⬇
ShiroBabychi
⬇
always evolves
⬇
Tonmarutchi
↙
Good care
⬇
↘
Bad care
⬇
Tongaritchi
Hashitamatchi
⬇
Bad care
↘
⬇
Good care
↙
Zuccitchi
⬇
Evolves from Zuccitchi with 0 discipline mistakes and good care. Cannot evolve into Sekitoritchi while the first Zuccitchi raised is still alive
⬇
Sekitoritchi
⬇
Sekitoritchi lays a Sega egg, hatches from most striped eggs
⬇
ChibiRomtchi
⬇
Always evolves
⬇
Romtchi
⬇
Good care
⬇
Disctchi
⬇
Good care
⬇
Pengotchi
⬇
Good care. Cannot evolve into Sonictchi while the first Pengotchi raised is still alive
⬇
Sonictchi