If you're looking for a specific CD, sort the table by CD or by character. If you want to sort it back by stage progression, sort it by Walkthrough.
CD
Mega Man
Bass
Walkthrough
043
N/A
01. Mega Man only can get this CD, by using Rush Search & CD-finder.
076
N/A
02. Mega Man only can get this CD, by using Rush Search & CD-finder.
054
03. This CD is hidden in a secret area (entrance shown in Mega Man's screenshot). Mega Man can slide under the Sydecka's rocket, while Bass should quickly dash and double-jump to the CD. Still, Mega Man will need the Ice Wall to get the CD.
020
04. There's a hidden hole in the platform. Bass can reach this CD with a double-jump, while Mega Man needs the Ice Wall.
061
05. Both characters can easily get this CD using a Shock Guard. Alternatively, Bass can maneuver carefully using the Treble Boost.
086
06. This CD is in a secret area to the left of the previous one. Bass can easily reach it using the Treble Boost, while Mega Man needs a shock guard, the Ice Wall and then either the Exit part or sacrifice a spare body.
045
07. Easy and in plain view! Remember that a Gabyoall can only be destroyed by the Wave Burner.
015
N/A
08. Mega Man only can get this CD, by using Rush Search & CD-finder. This is a tricky CD. Mega Man should slide in from the left, call Rush before the slide ends, then slide out and lure the falcon robots on a higher platform. Still, some enemy could attack Rush anyway.
004
09. This CD in in the room right after the previous one, jumping down. Bass can easily get it with a double-jump. Mega Man can get it, too, but it's more difficult: he should stay to the right as much as possible, use the Lightning Bolt to stop the fall in mid-air, then keep pushing to the right.
081
N/A
10. This CD is in a hidden area; after getting the previous one, jump down and walk to the left. Mega Man only can get this CD, by using his slide and the Spread Drill.
097
N/A
11. This CD is in hidden within the hidden area. Mega Man only can get this CD, by using not only his slide and the Spread Drill, but also the Wave Burner and the Ice Wall.
016
N/A
12. Mega Man only can get this CD, by using Rush Search & CD-finder.
Dash: he dashes back and forth three times, and he's invincible while doing that; stay in the middle of the room, and jump over him.
Charged lash: he jumps, charges up and lashes down; when he lands, green fire spreads around him, then he starts dashing again; again, he's invincible during this attack; stay in the middle of the room, slide/dash away, then jump over an edge when he starts dashing.
Bear traps & Wave Burner: he jumps up, throws three bear traps across the room, then starts closing in firing the Burner Wave; counter-attack using the Ice Wall, and push him into a spike pit.
Bombs: he stands in one place and start throwing a series of bombs; counter-attack using the Ice Wall, and push him into a spike pit.