4 Grim Gotchis show up, circle around your Tamagotchi, Chestnut Angels carry it, and a screen with a black background, an Obaketchi, and flashing arrows pointing to the A and C buttons. Press A as soon as a Grim Gotchi shows up, otherwise, it’s on the road to death.

Yep

If you're asking what leads to their death, it's pretty much neglect. You leave their hunger or happy meter empty for too long. Or leave them or their room covered in dust for too long which gets them sick and leads to death if not taken care of.

Yep

And the way to know that your tamagotchi is about to die is if you see the grim gotchi.

Yeah!

And I recommend not to buy tamagotchis to your kids bc then they will be traumatized when they see their tamagotchis die

Uhhh