Goku (if db had nen)

This is a version of Goku from a world in which the dragonball world has the power system from the incredible Hunter X Hunter, that Being Nen. Speaking of which, this version of Goku also has Nen, he had it unlockeed by Grandpa Gohan before his rematch with Demon King Piccolo.

History
Most of Gokus life before the demon king Piccolo saga is basically the same, except Grandpa Gohan is still alive (thats because he has Nen). During the Piccolo Daimou arc, Kid Goku had to find a way to defeat the evil Demon King, he found out that his grandpa had a power that could take on this demon king. Goku had his Nen unlocked by Grandpa Gohan, Goku discovered that he was an Enhancer and practiced his power as much as he could in the time he had. He used this power in order to defeat Piccolo and he ends defeating Piccolo with his new powers.

During his training with Kami he had been spending his time trying to master Nen. Eventually during the fight with Piccolo Jr, he discovered that Piccolo had somehow gained Nen and had the classification of Conjurer, Goku used his Nen and Ki combination in order to defeat Piccolo and only just won. Eventually during the Frieza Saga, when Goku unlocked Super Saiyan, he realised that cahnging his hair colour isn't the only thing that changes, he switchs from an Enhancer into a Specialist (similar to Kurapika and his eyes).

Nen Powers
Double-edged blade - he attacks someone and the damage of his attack is multiplied by the level of negativity of his opponent. However if he does do that, he takes damage equivalent to what his opponent can unleash multiplied by there level of positivity. (This attack is most useful against those who are pure evil).

Ki to evolution - using his Nen, Goku can increase the power of his Ki and make himself practically unstoppable. The longer he uses this power, the more he suffers (If he uses it for 24 hours it is certain death).