My first Tamagotchi was a Connection Version 2 bought around 2005. I was 10 at the time, and the device had a wave of popularity through schools in my area. Wanting to be part of the action, I persuaded my parents to purchase it. My sisters got one each as well.
My unit had a green shell patterned with red flowers. Oddly, I remember my first Tamagotchi pet inside it more vividly than the events surrounding the purchase of the toy.
A girl hatched out of the egg, and I named her Wendy. She became a Hitodetchi as a child, Ringotchi as a teenager and finally Kuchipatchi as an adult. I must have taken pretty decent care of her in hindsight if I ended up with a Kuchipatchi (An above-average tier Adult in this version). I eventually married her to one of my sisters' Tamagotchis, which was a male Kaerutchi (But can't remember what his name was).
I also somewhat remember a few of the next generations as well. My second generation, a boy named Timmy, grew to be a Marumimitchi, though he married via the Matchmaker. My third generation became a male Pyonchitchi (Can't remember his name) and then my fourth was a male Memetchi (Can't remember his name either). I can't remember the generations after that, but I played with my Version 2 for ages and it kept running with subsequent Version 3s and 4s that I bought.
I still have this Version 2, and I just recently re-activated it alongside most of my other old Tamagotchis. The unit has deteriorated with age and use though; the speaker doesn't work, there is a line of dead pixels on the screen and the buttons aren't as responsive as they used to. At least it still runs and connects though! My other Tamagotchis, luckily, aren't in nearly as bad shape.