Child Damage Boost death-climb to 3rd Key

----- DOUBLE CHU AND SWORD -------
target the ledge you want to climb, then double chu with holding R. you have to release R at the latest on the sidehop frame.

                       press B    :  1   2   frames after sidehop

Sidehop 2 frames before explosion :  O   O
Sidehop 1 frame  before explosion :  O   X

NOTE : A good visual cue is the second chu being on A button. frame 2 and 1 before explosion are not so easy to differentiate so I'd suggest to always go for the B press 1 frame after sidehop.
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----- SINGLE CHU AND SWORD -------
facing the wall you climb,

7th red :
1st explosion : X  X
2nd explosion : O  X
3rd explosion : O  X
4th explosion : O  X
5th explosion : O  X
6th explosion : X

4 before blue :
1st explosion : O  O
2nd explosion : O  X
3rd explosion : O  X

3 before blue :
1st explosion : O  O
2nd explosion : O  X
3rd explosion : X

2 before blue :
1st explosion : O   X
2nd explosion : X

1 before blue :
1st explosion : O  X
2nd explosion : X

Blue after 7th red flash :
1st explosion : O   X
2nd explosion : O   X
3rd explosion : X   X

8 red :
1st explosion : X  X
2nd explosion : X  X