Best Friend 4

Spoiler

Good use of the bot stacking trick (which @richardfu_ showcased in his Last Mission but did not utilize ). The 2nd ball was however too hidden, so it wasn't very obvious regarding what the horizontal slider was for, until I actually released R.

Then, R also had difficulty going up using the lift......I had to get B up and use the Tripping On Air trick to fall back onto the ground, then the Boogie Bot trick at the corner to get back to R so that B can force him up from behind. Not sure if I was supposed to let R go up by himself, but the lift could have been made more user-friendly by changing it into a draggable. I also thought of standing on the first ball to let B fall (it's another way to get B to the ground floor ), but there's only one ball up there and it's for completing R's escape path, so there's no way I could release R and reuse the same ball to fall.

Still, 5 stars for the challenge and the series's overall quality

@cpw What is the bot stacking trick?

@Muslim Arizzy Ohh, I overlooked that B could go behind R again after he was pushed up. Sneaky! But as @chemi said R could also do it alone with the right timing

@meko I made a typo It was introduced in Revolt V.

Spoiler

Its last move involves sliding the draggable into a wedge, which firstly gets R onto the wedge, then secondly when you repeat the same for B, B would slip underneath R's legs and pushes R up. R is now stepping on B's eye