Wizard Costume is a retired Marapets costume from Feb 2005. Wizard pets are navy blue, wear blue wizard hats, blue robes (Tantua only), and handle wands with ease. Most of them also wear capes with the same patterns as their hats. An example of a species of Marapet which can wear the Wizard Costume is Tantua.
Costume wizard

Rarity 36

Tantua wizard (1)
Egg cos wizard

The Easter egg