The christmas tree and the sleigh animation are normal, and so is the exclamation mark. Every Tama-Go does that, other versions have special seasonal animations as well, as you probably now. I have a Kuromametchi on my Tama-Go too, by the way!
I have recently found a picture of how the Tamagotchi L.I.F.E. clothes are supposed to look like... like I said before, I don't really like them (I prefer pastel colours to bright and dark ones).
My dream Tamagotchi is the Yellow/Black P2! It used to be a Japanese Angelgotch, but luckily I found the exact one I wanted on eBay, I'm just waiting for it to be despatched.