Luffy's current peak power is Gear 5, his awakened devil fruit form enhancing his abilities significantly. Gear 6 is unlikely to exist, as Luffy has stated Gear 5 is his pinnacle devil fruit form.

Luffy has been brought to life by Mayumi Tanaka and Colleen Clinkenbeard respectively. In Germany however, the Straw Hat ...

Even in terms of his Devil Fruit progress, there is a lot that Luffy can still work on and learn moving forward, and it is ...

One Piece is purposely holding Luffy back as his greatest power has one major issue and the manga must solve it.