Okay, if you say so! [whatever obstacles Luffy wants to set for himself, Goku'll do it! besides, if he learns what Luffy can do and adapts to it, it'll be even more challenging for the pirate. all the better training in general]
If you want, we can go to the Battle Dome or just some place away from the village.
[Video]
If you want, we can go to the Battle Dome or just some place away from the village.