A Pocket Monster Pokemon ball that converts to a yo-yo. Made by Bandai. Uses a transaxle system and starburst response. Included is a reverse twist 3-strand cotton string which is uncommon. To play the yo-yo you needed to remove the black plastic insert from the middle circumference. When you were done yo-yoing, you slid the plastic insert back into place to complete the ball shape. A total of five Pokemon ball yo-yos were available.
More of a novelty yo-yo with limited functional playability. It's unknown how these were originally sold, although the packaging suggests that it may have been either dispensed from a vending machine or from a counter-top display box.
The Pokemon ball in this exhibit is known simply as the Poke Ball. It's the most widely known ball in Pokemon. Pokemon balls are used in the children's Pokemon fantasy game to figuratively capture and store pocket monsters.