When you abandon your Neopet all Neopoint, Neocash and paint brush clothing it may have been wearing will be placed back into your closet. Abandoned Neopets will not enter the pound with any clothing items.
If you are sending your Neopet to another user using "direct transfer" the Neopoint items your pet is wearing when you send them will arrive with the pet on their new owner"s account! Neocash clothing and items will be returned to your closet and cannot be transferred with a Neopet. Finally, any paint brush clothing in your closet that matches the colour and species of the pet you are transferring will go with the pet, even if it is not wearing it!