From The Wajas Wiki

DNA is a special type of item that alters a waja's appearance permanently by adding a specific mutation to it, similar to Potions. However, unlike potions, DNAs are very expensive (released for 10-12 CWP in the Monthly Items Shop, 50,000,000 WC in the Dye Shop, 2,000 RKP in the Raccoon King Shop, and 100-250 Leaf Points in the Leaf Exchange), cannot be created, and some of the mutations it adds are also available during Custom creation.