What they mean is a glitch, a problem on the Tamagotchi's programming that makes it do something he wouldnt do normally. Once I had a debugged v2, and I had a Kinakomotchinamed Milly. Before Kinakomotchi, I had a Debatchi named Bob. My kinakomotchi flashed a "low battery" sign. I downloaded, and guess what! my tama came back, but it had Milly's stats, and Bob's Debatchi character! H stayed like that until the next day, when he evolved normally into a Young Mametchi.