The Evil Witch, appeared in the episode "The Tale of the Pinball Wizard", she was portrayed by Nathalie Gauthier.
Inside the real world, she was a homeless Bag lady. She frequented the same shopping mall where Mr. Olson worked and ran his business.
The one day, she encountered Ross Campbell stealing money out of the water fountain. She wanted the money too and she fought him for it, until The Security Guard broke them up. Then soon, Ross Campbell broke Mr. Olson's trust, by playing a certain Pinball machine game when being told not. Soon enough, the inside of the Shopping mall, magically became the world inside the Pinball machine.
Her body was then chosen as a vessel to become The Evil Witch. The character of The Evil Witch was a villain from Mr. Olson's pinball game. The pinball game was a manifestation from Mr. Olson's evil and wicked imagination.
Nothing is known about her origins and background. All that is known, is that she's a frightening and scary evil witch, with very little magical abilities other than being able to blow powerful gusts of wind. Her main goal was to overthrow Princess Sophie, and become the Wicked Queen. To do this, she needed to collect the three main items from the game. The Items were the music box, the throne and the tiara.
She came fairly close, when she got the tiara and she nearly crowned herself queen. That was until Ross and Princess Sophie played the music box and it vanished just before she could put it on.
She was last seen getting run over by the throne, when Ross was riding it to the third level. It's unknown if she was defeated or knocked out cold. Since all that was seen from her afterwards was a torn garment of her gown.