Actually the thing is, in mode G and N, stage 37 won't loop back to the beginning, but stage 13 of A (or D or H or K) instead. And stage 49 loop back to stage 13 of the B (or E or I or L) instead, the process repeat until stage 109, which loops back to the beginning.

This mode and the N mode are the same. It's the mixture of the other modes together into this mode. So there should be a 1P 108 stages, 2P solo 108 stages and co-op 108 stages.

I have been having an idea of a low% for the game (which is to beat it without using power-ups, kill any enemies (except for boss), using shells against enemies (except for 3rd boss). Time starts and stop the same as any%