Without any additional numbers, underlines etc. Just straight named after anything DB related. Be it on YouTube, Tumblr, E-mail, PSN/XBL/Nintendo Network, Instagram, Snapchat or any other widely-known service that uses the one-per-person username system.
I knew the owner of YouTube's "Goku" and "Vegeta" channels, but he is kinda inactive now, which is a shame but oh well. Myself, I own the "Broly" name on YouTube, for whatever it's worth. I also managed to register SuperSaiyanGod and SSJGod on Tumblr but can't access to them anymore.
Do you possess any official Dragon Ball names online?
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