That is another fanmade checkpoint, some other people also mess the wiki up.
The music was one of the music that is only from the multiplayer and co-op mode. The air color is blue
It was 2 stages long, but this stage had the same music with Stage 3 of Checkpoint 10. The music is unknown.
Stage 3 was kind of a break stage. No glass but only crystals. The air color turned light azure. That was a same music from a calm music only from Zen mode.