The answer to this question is a matter of opinion.
Contributors have said:
Liberty is very cute.
Pooky or Roxy
Which moshling is the cutest is a matter of opinion. Some might think Poppet is the cutest while others might choose Luvli, Katsuma, Diavlo, Zommer, or Furi are the cutest.
No, there is no hamster moshling on Moshi Monsters.
There is no squirrel moshling on Moshi Monsters.
There is no Christmas moshling on Moshi Monsters.
There is no Bessy moshling on Moshi Monsters.
There is not Moshling called Stingy on Moshi Monsters.
No, there is no Moshling named Boney on Moshi Monsters.
There is no Stringy Moshling on Moshi Monsters at this time.
There is no Moshling named Libby on Moshi Monsters.
There is no moshling named McNippy on Moshi Monsters.
There is no moshling called Diamic on Moshi Monsters.
As of May 2013, there is no moshling with the number 26 on Moshi Monsters.