Sonic Wave is a well known level in Geometry Dash, and used to be the hardest in the game. It's a Nine Circles level, and was verified by Sunix and made by Cyclic. The level has a dark blue color scheme. Sonic Wave is really chill and cool,  very calm as well. SW can be his nickname. Sonic Wave has many remakes: Sonic Wave Rebirth, Auditory Breaker, Sonic Wave Infinity, The Invincible, Sonic Wave Deluxe, Generic Wave, Sonic Wave Unlimited, Sonic Wave Eternity, and a sequel called Cosmic Cyclone.