The sub One Piece is real.

For some reason Knuckles can just climb up this ceiling with a precise cling, and then you can just spindash to the end of level trigger.

Doing this level in less than a second is incredibly difficulty however. You practically have to play perfectly, which involves:

1. Initiating a 1-tap spindash on the 1st frame you land
2. Releasing the spindash on the very next frame
3. Jumping on the next frame after spindash release
4. Cling on the wall at the peak of Knuckles' jump height
5. Jump off the wall quickly to gain height
6. Cancel the jump into a glide on the next frame to cling on the wall again to climb up it
7. After Knuckles finishes his "climb-up" animation (which you can't see), quickly 6-tap as soon as possible

Any slight delay on any of these steps, and you most likely lose the sub 1 second time.
I was on a VC with Von Ryder and Speed Egg when I achieved this. Christmas Miracle.

Funnily enough, the game doesn't acknowledge times that are less than a second in the in-game leaderboards, so according to the boards, I have a 0:01.00 time on this level.

I do Sonic stuff at:
Twitch:   / joeybaby69  
Twitter:   / baby69joey