Avoid the bullets shot from the robots. It's ok to touch the robots.
My son and I were trying to get clones from one sprite interacting with clones from another. (Laser clones coming from one of several robot clones). He got it working by defining x and y variables for each robot clone. My remix used a table of coordinates to be fired from... so the robot loads coordinates to the table, lasers poll the table for their firing instructions.