To get the bubble wallbounce, be on the right side of this background line and buffer the wallbounce during transition.
You only need to hold right as you perform the wallbounce.
Hyper into the key and try hugging the left side of the crumble block hole to land the downleft dash.
This downleft dash can be made easier with hugging the left side but it takes a bit of feel to get used to.
Do two downleft dashes after clearing the small space and one downright dash to make the cycle.