Not early 90s, but I still have the magazine ad for Dragon Ball GT Final Bout (plus the game) 
It is incredibly cheesy and says something like "how did this lethal weapon get through customs?"
It is a really bad game, btw. Even as a young dragon ball fan, I thought it was trash. Luckily my friend imported Dragon Ball Z Legends and that totally rocked.
It made DBZ Ultimate Battle 22 look good!

Total shit game. I'm sure I've posted this before, but we would sell tons and tons of copies of the Japanese version (and later the U.S. version when they finally did re-release it...hard to believe, but at one time the American version was insanely RARE and sold for a few hundred bucks!). We'd tell customers how bad it was and they'd buy it anyway. Even in front of the boss...he'd just nod his head and say "see this? These guys are telling you this in front of me, but I don't care. The game sells." And the customer would buy it, bring it home, likely hate it, and sell it right back to us.

[youtube=560,345]pI-zXj13CTQ[/youtube]
this game
Sucked. The Saturn version of it was an "improvement" and even then it sucked. Garbage game. Good soundtrack though.
IMO the best DBZ games are Legends, Hyper Dimension, SuperSonic Warriors, and Super DBZ. The latter played pretty nicely and even got an arcade release, but bombed miserably.
My first import game was Jet Set Radio on the Dreamcast. I sat out on console gaming during the PS1/N64 era. The DC was what got me back into things.
Damn man, you missed out on a great era! (Well, N64 aside that is

Playstation and Saturn rocked.)
My first import game was the "Twinbee Yahoo Deluxe Pack" or something like that for the Playstation. It was bought from the store I ended up working at. I think that was the first game I ever bought there and I had been going to the store for like two years.

There used to be an arcade in the same shopping center that I'd go to and when I ran out of money, I'd go there and bug them to try out games. They had the PSX and Saturn in '94 on demo. Anyway, I went in looking to see about importing Street Fighter Zero, and found out it wasn't out for several months, so I got the Twinbee game and then later went back for one of those Live Power Pro games. Street Fighter Zero was my first mark-out import moment though. It was released in December '95 IIRC, a few months ahead of the States. I played the shit out of it. From there I ended up importing more games than I bought domestic ones.