I plan on having a young martial artist who found his master over the internet and trained with his kama in his mother's basement. I don't think that giving him nanomachines or stuff like that really fits. Maybe cyborg augmentations, but only if he loses an arm or a leg first, yaknow? I'd prefer mystical items and such. Dragonball always felt more like Journey to the West + Aliens than sci-fi.

EDIT: Also I feel like the Kaioken is an interesting technique and should somehow be in this Roleplay.