He had 100 trillion Skill Points at the start of the game. Any skill he learned could be maxed out with Skill Points!
His swordsmanship level was maxed out. Bodywork level maxed out. [Nautical] level maxed out.
Cooking level maxed out. His medical skills were maxed out!
The Devil’s Fruit’s ability level was maxed out.
Three-Colored Tyrannical Aura? They were all maxed out!
As long as he learned a skill, he could max it out with skill points!
He could even max out all his life skills!
The System replied," The System has been upgraded. The host can give skill points to others!!!”