You either use a transmorph. potion or a morphing one (found at the TP) or a magical plushie.
The reasonably cheap morphing potions are the blue moehog, green uni, and orange koi.
To change the color of your Neopet.
It can change color and/or type of neopet! It can also level up, get more hit points ect.
yes i have neopet on my neopet id
Yes neopets may change hit points.
Yes. It's random though. So somebody could feed Glowing Jelly exclusively to their Neopet and it will never change to the glowing color.
Paintbrushes can be used to paint your Neopet the colour which the paintbrush specifies. i.e. A paintbrush is one method which you can use to change your Neopet's colour. Paintbrushes for Petpets are also available - these change your Petpet's colour.
According to neonewsnow.com the Witchy Negg 'Can change your NeoPet into a Lenny, Tuskainny, or Moehog, change NeoPets gender, boost there intelligence, raise there HP or cure any diseases the NeoPet has.'
If you mean from content to happy or something like that, just buy your neopet a cool toy to play with. :) you can obtain them from the local plushie shop in the neopet central. Some cheap toys are: pinixy keyring, red tuskaninny plushie, and blue mynci plushie.
A Nimmo is a neopet.
no your neopet will never die
The 'hungriest' a Neopet will get, is the 'Dying' status.
I'm sorry, but no. There's no way to change the name after it is created. If you adopted the neopet from the pound, recreate the same neopet if you choose and enter the name you wanted it to be. Though you can still keep the other neopet or abandon it so someone else may adopt it, but that's not nice, is it?? You have a limit for owning Neopets which is 4 neopets on every account you create.