u/AmbitionRepulsive515

Luffy's great endurance in fight.

Luffy vs don kreig and arlong.

Fight with cp9 using gear 2 gear 3

Even in wano he hold up gear 5 not eat still power up and fight kaido.

In elbaf he is not keeping up his stamina for loki whonis injured from shamrock attack not fully recovered still fighting Imu Luffy need to do something permanent solution for gear 5

In the void century the people had powers without eating devil fruits like sun god rain god some mythical creatures like azure dragon and nidhog and they reincarnated into devil fruits with their original will like luffy liberating every island and Imu might be the one of the people who still alive who having his original powers