Tamagotchi version: GBC (Game Boy Color, but is a ROM for an emulator on my phone)
Reason of death: Being overweight by a lot of ice-creams by my own 18-year old sister (thanks a lot, sis...>.>), even though I didn't feed him THAT much ice cream, but she HAD to give him one more ice-cream to kill him.
Age at death: 2 years
He was a good Tamagotchi, ever since he hatched from that egg. I treated Sonny as if he were my own, but he only lived for only 2 days...due to overfeeding.
R.I.P - Sonny the Tonmarutchi. I hope our paths will cross again someday. You were just about to evolve again...until your death.