Besides dimensions, do team have to meet a specific weight limit for the robot?
If so what is it?
There is no weight limit whatsoever for VRC robots. The rules do not even mention weight. However, you want to try to build as light as possible so that your robot can move around with decent speed.
I suggest reading the game manual before asking questions about it on the forum. 9 out of 10 times, the answer you’re looking for is there in the game manual.