First and foremost: It's a trick of the light, the tama is reflecting light, not backlighting.
Also, Shirobabytchi is the white baby, and is usually on Any Tamagotchi, as it's the basic baby from Generation 2 to Keitai. (generation 1 has babytchi, the black one.)
Besides that, i cant see any more questions to reply to... so yes. thanks for listening.