Wanda is a fairy that first appeared in Mario & Wario, a Japanese-only Super Famicom (SNES in other regions). She has only appeared in one other game being Wario's Woods for both the NES and SNES. Her name is a play on words of wand as she is a fairy who carries a wand.
She is typically seen helping out Mario, as in the case of Mario & Wario or helping out Toad as she does in Wario's Woods.
Wanda wears mostly red. She wears a red hat, red dress and red shoes. She has blonde hair and wears golden bracelets. She has fairy characteristics, such as white wings and a gold wand with a crystal ball at the end. However, in Wario's Woods, Wanda wore a pink nightcap along with a pink outfit.
Mario & Wario
In Mario & Wario, Wanda helps Mario, who has been blinded with a bucket over his head, make his way through stages and provides a safe pathway for Mario, making sure he doesn't die. She uses her wand to move objects or hazards out of the way so Mario could make it too the end of the level.
It is revealed that Wanda lives in the Peaceful Forest (later to be known as Wario's Woods) which has been under attack by Wario. Wanda calls upon the help of Toad to save the Peaceful Forest from Wario.
In the game, Wanda helps Toad get rid of Wario's monsters by providing him with bombs.