Sometimes you don’t even need to learn Japanese. Dragonball characters are like 75% English transliterations.
You know whats the worst? English Transliterations where the family name is something like Alan or Rodderick and the characters first names are Fitzgerald or Caldwell.
Bobson Dugnutt is perfection.
Sleve McDichael lets you know right away what you’re in for.
ProZD did a video calling these in an announcer voice, which I come back to every year or so for a good chuckle.
Fake American Names in a Japanese Baseball Game

YouTube
He has the perfect voice for this