Walleo is Waweegee's fat, greedy brother. He loves pickles so much, that when he says "Pickle" at someone, the turn into a pickle. He even tried to turn the world into one! He also has a form known as Toon Walleo. His father is Papa Waweegee, mother Washesh, and uncle Waperio.
He was born when Washesh was having a child, but some Malleo DNA got into the womb and made the child half Malleo, half Waweegee. Walleo was named when Papa Waweegee remembered his old enemy, Wario, so he named his son Walleo.He went to McDonald's (who has been renamed McWeegee's in the United 'Gees Galaxy) because he was obssessed with their food. He later died. Un Ded went to the restauraunt to revive Walleo and Walleo II was created, who joined Al Qaeegee. However, he once again became normal by Waweegee and got himself and his name back to normal.