Mangobean only appeared in retail, IIRC.
Yeah, I only seen him once in my early days, back then I didn't cruise the forums and I didn't know how many people where butt-hurt over him, him and Captain King paled around. I used to frequent around with Captain King and his server and one day Mangobean came in. I haven't seen Mangobean since '07 and Captain king since '08 but he was under a different name.