I found this tama on ebay here, and I'm not sure it's an en-tama. It looks to me like the previous owner added some stickers, but I still didn't see that shell colour listed on Mothra's page.
Bandai's site showing EnTama shell designs is here: https://tamagotch.channel.or.jp/toy/entama/lineup.html The shell pattern in question is on that page (but that doesn't prove anything since many Asian-market V4 shell patterns were copies of EnTama shell patterns.)
However, the description in the listing says "Japanese version", and the item ships from Japan. So, I think it is an EnTama.
It's a Keitai, not an Entama. I was considering buying this one myself. It has the black pixels; it's not an Akai Keitai. It's been in that store for at least two years that I know of.