I am not talking about Ultimate Flash Sonic so dont get confused anyhow how do you beat the boss in the Aquatic Paradise zone in the online game Sonic Flash

While carefully avoiding the spikes, keep an eye on the boss, if it isnt facing you, stand on top of the red box and jump out of the way when a bomb comes and hits it. this should get the boss's body (the silver wheel on the right) to turn around.

When it does, jump over to the boss and trick it into bombing it's own face (the black and yellow thing on it's body) the same way you tricked it into bombing the red box, to damage it.

After awhile, it will die, but be sure to finish the job before the ceiling crushes you.

Hopefully this helps.