I understand you're looking for a proper report on "Sonic Battle JUS MUGEN v3 New" — likely a fan-made crossover fighting game using the MUGEN engine, combining characters from Sonic the Hedgehog, Jump Ultimate Stars (JUS), and other franchises.
Mugen is a free, highly customizable 2D fighting game engine. Users create original characters (via sprite editing, coding) or import existing ones from other games. “JUS-style” in Mugen refers to:
Down, Down + AttackSprite Work: Uses a hybrid of custom-made sprites and "ripped" assets from DS titles.
The "V3" update is a significant leap from previous iterations, focusing on roster depth, visual fidelity, and technical stability.