As mentioned, its control scheme is based on the original Virtua Fighter 2 and many of these other games keep this. Virtua Fighter 2 VS Tekken 2 seems to be the first of these Mega Drive bootleg games, as its engine has been reused in games such as Tekken 3 Special, Soul Blade Super and many others.
All of the music is from Virtua Fighter 2 as well. The Fighting Vipers and Tekken 2 characters were also remade in 2D, using their models as a base.
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The graphics are mainly from Virtua Fighter 2 (Most likely the Sega Saturn or the PC version, as none of the graphics were taken from the Sega Genesis version.) although the models were redrawn into 2D. There is an options menu that not only lets you change the difficulty and the amount of time for reach rounds but also how much damage you can take. It is possible to juggle the opponent and even hit them off the ground (without the use of a ground pound). Counter hits are also notably missing so hitting an opponent while they're attacking will do the same damage. Most of the attack strings don't seem to connect properly, as the opponent gets pushed back too far during the hits. Compared to Virtua Fighter 2, the characters move much stiffer and slower. However, the stages themselves do loop endlessly and lack any kind of wall.
The game itself plays much closer to the usual 2D fighters characters automatically turn around if the opponent switches sides and the stages lack any kind of ring, thus lacking ring outs. ( Down + C) Jump kicks have to be performed by pressing C at the same time you jump, there's no jump kicks that can be performed on the way up or as you're falling. Most of the recovery options were also removed save for the sweep kick. However, most of the other basic techniques from Virtua Fighter 2 (as well as the other aforementioned games) have been dropped, such as jump punches, throws and ground pounds.
You can also quick step by double tapping Forward or Backward just like in the original. The control scheme is the same as Virtua Fighter 2, with B and C being used to punch and kick respectively while A is used for blocking. Despite the name, this game is heavily based on Virtua Fighter 2 with several characters from Tekken 2 and Fighting Vipers (based on their Fighters Megamix appearance going by their icons).