Grundo were once a peaceful people until they were enslaved by Dr Sloth. This should explain http://www.neopets.com/space/comic.phtml
Yes, you totally should feed your grundos! You don't have to, but after a while it gives you the sad face and it makes you feel guilty! But, yes, they are neopets too, and you should feed them.
The rainbow pool http://www.neopets.com/pool/ will tell you what colors each neopet can be painted.
no not really you can get them at the space station
The Rainbow Fountain works on Neopets if you are a Neopets mod, or if you have a Fountain Faerie quest.
As long it is neopets it can work but don't put gravy on the survey monkey!
No.
Jellyneo.net
Just about any font is usable on neopets - if there's more than one word in the name put them together.
Maybe its your computer maybe try a other computer in your house.
No I have tried that code and it did not work.
You have to do an extremely rare Fountain faerie quest.
I recommend AnimeLyrics.com. I don't know if it will work on a neopets page though. I use it to find the songs.