The Heroes of Goo Jit Zu Sonic S4 W1 Hero Pack - Unstoppable Surge Knuckles Stretch Figure brings powerful stretchable action to your Sonic collection. Knuckles is ready to battle with his unique unstoppable surge form, featuring a goo-filled body that can be stretched, squished, and twisted for dynamic play. With bold colors and authentic Sonic styling, this figure delivers tactile fun and action-packed storytelling. Stretch him up to three times his size and watch him return to shape, making every adventure wildly gooey and supercharged. heroes of goo jit zu knuckles, sonic stretch figure, unstoppable surge knuckles, goo jit zu sonic toy, stretchy knuckles figure, knuckles action figure, goo filled sonic toy, tactile hero toy, squishy sonic toy, sonic goo figure