Tennis Ball's Magnet is a horseshoe magnet owned by Tennis Ball. It was seen in Episode 14 when Tennis Ball uses it to retrieve Bally and Marble out of the hydrochloric acid vat to get 15 bonus points. It was used again in The Glistening when Tennis Ball got angry because the Announcer called him "clumsy", so he attempted to de-magnetize the Announcer with it, just like how he threatened the latter before in the previous episode. When the Announcer has the magnet used on him, he talks a bunch of nonsensical words and noises. It is unknown where he got it from.