I have new suggestion for robots.
H.A.N. Base Robot.
It's a huge robot that forms when the H.A.N base is under threat. The base transforms itself into a huge robot, capable of loads of artillery power and lots of defense. It sadly, has a very slow speed. On its stomach section, the robot factory goes at work creating robot minions to release to prevent the enemy ground troops from attacking, they are immobile to the H.A.N. Robot's attacks, which renders the robot having no fear of attacking his own troops.
H.A.N. Minions
These quick, fast robots have very high speed, making up for the Base Robot's weakness. They have low attack power so they make up for it with rapid fire machineguns. They can only be destroyed when shot througth the two eyes, which is deadly!!!