Goku's had a lot of different forms from the original series, to DBZ, Dragon Ball GT, Dragon Ball Super, and most recently Dragon Ball DAIMA.
Power levels, or Battle Power, are a Dragon Ballseries staple. Making an appearance back in early Dragon Ball when a young Goku learns to sense ki after drinking the Ultra Divine Water, Power Levels ...
Goku might be stronger, but these OP anime characters outclass him.