Robots cooperating is nothing new. We have covered smart ants and other robots that can cooperate to get complex tasks done. This video shows two robotic cockroaches cooperating to climb a taller step that they could individually.
The addition of a winch module that exerts tensile forces on a tethered magnetic connector allows the robots to form connections, provide tether pulling assistance, and remove connections…. robot team can climb a high-traction sandpaper step 6.5 cm in height, which is tall relative to their 10 cm body length.
BiomimeticMillisys has more on these robot teams.