Cosmo Climb (1) is a trick made by DECosmic to quickly reach the door in the penultimate room of M21. This trick avoids a bunch of platforming that you would otherwise need to do, and therefore saves around 10-15 seconds if done correctly.
DECosmic used Yami's 100% SM12 note (2) from Bone Dragon to apply the same approach on Plasmas in M21.
To perform this trick correctly, you need the following:
Cosmo Climb exploits Vortex Lvl 2's ability to override Dante's lock-on and keep Vortexing in the same direction once started as long as Dante has the required DT to keep the Vortex activated. To perform the trick here are the steps:
This is the position where you could get the perfect climb in SM12