It sounds like you're referring to a fighting game build titled "Sonic Battle JUS Mugen V3" — likely a fan-made crossover featuring characters from Sonic the Hedgehog and Jump Ultimate Stars (JUS) style gameplay or sprites.
Fan projects vary widely in quality, legality, and stability. Always use caution when downloading community content: prefer reputable community hubs, scan files for malware, and respect creators’ distribution notes. Sonic Battle JUS Mugen V3
The gameplay focuses on "Turbo Mode" and leveling up during fights. Characters can utilize a "Double Boost" or transform into more powerful versions as they gain experience or fill energy meters. The JUS style ensures that despite the complex roster, the controls remain accessible yet deep enough for advanced combos. It sounds like you're referring to a fighting
But as the stun faded, the AI adapted. It teleported behind Shadow and countered with a Level 3 Super Move. A cinematic cut-in of Sonic’s intense face flashed on screen. The "Super Sonic Flash" filled the monitor with blinding white light and damage numbers. The gameplay focuses on "Turbo Mode" and leveling