Hide and Seek
Start by moving along the red path to guide the Bully to the green buttons. Now collec the Bonus Bubbles, leaving the circled bubble for last. Move along the yellow path - make sure to pause at the "X"s to allow the Bully to see you before taking corners - and hence guide the Bully to the blue buttons. Finally, follow the white path to guide the third Bully to the white buttons.