Im sorry for this really late bump, but I just found this, and the SNES variant is just adding to the amazement/confusion..
If this has already been discussed, Im sorry for re-hashing it. I have a theory that this game, Pocket Monster, Top Fighter MK VIII, and Super Donkey Kong 99 are all made by the same developer. They all include backgrounds that "mirror" to repeat, they all freeze objects on screen when fading in/out to black, and the stiffness of controls is practically identical. In addition, the music all sounds the exact same.
Has a name for this developer shown up in any of the ROMs, by chance? If so maybe we can add some clarification on the Bootleg Games Wiki. (Also I've noticed there's no page for Pocket Monster 2 on the Megadrive, but I'm not so great at writing out those pages)
This is really interesting stuff, and I am a big DBZ fan