This appears to be a part of the "Ohblocker" from the tokusatsu TV drama "Chouriki Sentai Ohranger." This is a giant robot that is completed by the combination of the five Blocker robots: Red Blocker, Green Blocker, Blue Blocker, Yellow Blocker, and Pink Blocker. The image shows the chest area of the Ohblocker. This toy is an accessory of the DX Chouriki Gattai Ohranger Robo, which was released by Bandai at the time. The black and yellow striped part in the center forms the chest of the Ohblocker during the combination.