Vanishing Gungaroo. 30 seconds faster than my original goal. The stage is a bit tricky because you have to wait two and a half minutes to get playing (you may want to skip that), I sometimes fail a trick, the enemies near the end appear randomly so I have to look for them, and finally, Vanishing Gungaroo is a slippery little thing.
At present, Decremated has 57,232 views spread across 3 videos for Mega Man X7, and less than an hour worth of Mega Man X7 videos were uploaded to his channel. This makes up 5.79% of the content that Decremated has uploaded to YouTube.