You know the kaijin and daikaiju of Ultraman, Godzilla, etc.
Choose the look of one of the established characters and then apply this formula...
100pt
Defense
Offense
Special
If this were a tabletop game with cool 6" miniatures and break away buildings, each 5pts equals 1D6 (a six sided die) of value.
So here are three examples of the same look
Defense 30...armored skin/plates
Offense 30...strong melee, kick/bite/tail
Special 40...radioactive breath
Defense 30...armored skin/plates
Offense 60...strong melee, kick/bite/tail
Special 10...radioactive breath
Defense 15...armored skin/plates
Offense 15...strong melee, kick/bite/tail
Special 70...radioactive breath
If these goes anywhere then we can use an online die generator and have battles
So you could choose a giant monster, giant humanoid, giant robot, or a sentai team