KDL1 has no abilities.
KA
Tornado Backup
3-3(mix), 3-5(mix), 4-1(far in level), World 5 Museum, 6-2, 7-4
High Jump Backups
World 3 Museum
KDL2
Coo Backups
2-1(2nd room), 5-3(Top door)
Cutter Backups
2-2, 3-1(2), 5-1(2), 6-1(2), 7-4
Fire Backups
4-1
KSS
Great Cave Offensive
Jet Powerup statue before Whale and Windows boss fight, as well as in wind room
Dyna Blade
Mix off parasol waddle dee at the start of DB2 Return to DB2 for future backups
Revenge of Meta Knight
Romk3 and Romk4 have mix setups at the start. Only go for it if practiced beforehand. Jet enemies at the start of Romk5. Do not lose Plasma, there are no backups for Plasma.
KDL3
Coo Backups
1-3(first door), 3-2, 3-3, 4-1 Going to 1-3 is always fastest when backtracking
Kine Backups
2-2. 2-3
Clean Backups
1-5, 2-1, 3-1, 4-1, 5-1
K64
Easy fire backups
1-1 / 5-1
Levels that have fire near the start / you don’t need it for
1-1 / 2-2 / 2-3 / 2-4 / 3-1 / 3-2 / 3-4 / 4-1 / 4-4 / 5-1 / 5-4 / 6-1
Pix
You can get spark at start of 2-2 but any double ability works
Acro
2-4 torpedo enemies (bomb)
Magman
If you lose cutter, grab needle from the start of 4-3