This is a matter of opinion.
Contributors have said:
I.G.G.Y is one of the most popular Moshlings with Moshi Monsters users.
Mr Moshi's favourite Moshling is McNulty, because she is based on his friend's dog in real life.
It is: I.G.G.Y.
Oddie all the way.
When Zack Binspin is released as a moshling on Moshi Monsters, he will most likely be in the RoxStars set.
from what i have seen under people's profiles, i think that coolio, and iggy are the two most popular favorite moshlings on moshi monsters
penny
Probably I.G.G.Y.
either tingaling or dustbin beaver
One of the secret moshling code boxes!
Most Cuddlies are not available in stores in Monstro City. To get secret codes for Cuddlies, you have to buy a Moshi Monsters Plush Toy. Note: codes may only work for a limited time.
Michael Acton Smith has lots of staff that help him think of all the names of all the characters and items on Moshi Monsters. There are lots of reasons why each particular name was chosen. Most of the moshling names relate to what the moshling looks like or what it does. The same goes for most of the Moshi Monster items.
1.HOBBIDIDANCE for Roxy the moshling 2.oneworld for the liberty poster
Contributors have said that I.G.G.Y is the rarest moshling. Because of his rare seed combination, I.G.G.Y is the hardest moshling to get. Another difficult moshling to get is Roxy becuase a moshi monsters moshling collector's guide needs to be purchased to find out her combination.
There are no most important monsters on Moshi Monsters. They are all the same.
At this time, Dustbin Beaver, Blingo, and Nipper are probably the most rare Moshlings on Moshi Monsters because you need to make a purchase to be able to catch them. There may be other monsters in the future which will also be very rare because you may have to make a purchase to get them, too.