Im new to all this so not greatly versed in the various rules but based of the robot wars rules I was under the impression that the rule applied to overall weights not indervidual weight or number of indervidual robots

I have heard Crackers for Crackers and Smash is only 50Kg with Smash being 60Kg to give a combined weight of 110Kg

there was also 'the swarm' from robot wars which consisted of 5 robots weighing 23Kg, 24Kg, 27Kg, 29Kg and 33Kg and can be fought in any number or combination thats total weight is under 110Kg