You can level up by playing puzzles with your monster, at the Puzzle Palace. You should do the practice puzzles as often as you can and also do the Daily Challenge daily.
It depends on what you want to get. Each thing has a different code.{ If you even need codes. The last time I played you just bought it with you Moshi Monsters money}
Moshi Monsters isn't on the PS2.
Most of the codes on Moshi Monsters are unique and can only be used by one person, so it would be very difficult to say which codes get you which things. There are different kinds of codes, but, again, the codes do not give the same kind of thing. For example, the Daily Growl Puzzle Codes can be for food or for items for your room/house, or for clothing.
to get shishi on moshi monsters u have to get the seeds at superseeds thing :)
there is no such thing sorry
No such thing.
The Moshi Monsters FAQ page is a good place to start. On the Moshi Monsters website click Help at the top.
I dont' think you get anything because there is no such a thing as rare food on moshi monsters
Well, MoPod codes in Moshi Monsters are codes you enter when you sign in. The bit that says "enter a secret code" on the bottom of the screen, is where you enter MoPod codes. But, entering a MoPod code is totally optional, so, you don't need to enter one. Note: add Applez202, she's a member :)
you have to type in moshi monsters and then click it and then click the thing that says adopt monster
Its is the best thing in the world!
some thing like moshi mosters