Virtual Pet

Nightopians/A-Life (NiGHTS - 1996)
Designing the A-Life System – 1996 Developer Interview - shmuplations

Chao (Sonic Adventure - 1998)
What the Hell are Chao? - Cybershell

Other

 * Tail of the Sun / Doshin the Giant (Iida Kazutoshi)
 * Furby
 * Barcode Scanners
 * Cabbage (N64DD)
 * Black & White/Spore ????