Adventurer is Graffito's long lost brother. He too got his powers from taking the super-drug, Tinalbin-Z. However, his exposure to it was accidental and as explained in his bio it had a similar effect on him by the abilities he gained but to a much lesser extent. As I explained to Starchild in my response under Graffito, the drug isn't very common, but people can get it if they try hard enough. I haven't really worked out the particulars of all that yet, but I can also tell you that if someone where to get it and take it, the results wouldn't always be the same as the abilities that these siblings got from it. The idea is that the drug kind of unlocks a latent "mutant gene" in people and gives them whatever powers that they would have if that gene was active, hence the "Z" in the name of the drug since I call it the "Z-Factor Gene" because you know chromosomes are "X" and "Y." So, instead of it being another "X" like Marvel does it, I just went with the next logical letter. "Tinalbin" is just a nonsense word that I made up that I thought sounded like what a drug would sound like.
Well, his half-bro's real last name is "Mario." I know it's so thinly veiled it's isn't funny. As for the eyes, no I was just trying to give him a bit of a stern look and it unfortunately came out a bit cross-eyed.
That big moustache makes him look like a bit like a Mario brother (or half brother). :D Another interesting character although is he intentionally cross-eyed?