well I dont knwo its not liek they every really made alot of GBA games all at once inaways, they always makea few key titles throuout the year and tel 3rd parties fill in the gaps. They could market DS and GB sepeaatle but they might have to maintain compatabilitiy betwwen the two, causing more confusion.. now when you analise it too much it starts soudning suspicously like Sega...
ANd no what Iw as saying abouot D-Pd is just what I said, NES,SNES,N64,GC,Ps1,PS2 and Xbxo all have the same style D-pad, take yor controlelrs apart and check it out, ive done this many times whiel fixing broken controllers. Sega is the ONLY pad that has true 8-way directional support, all the rest simply have a cross pad and 4 sensors right- left- up- and down
Teh Sega pads have those four AND Diagnals also, Sega has a patent on it they have ever since Genesis days ist how they maintained their pads were better than Nintendos (much better for Fighting games)
They workded JUST FINE for the 3D games on the Saturn and even Dream Cast had it but never used it cuz they had analog stick so obody even used the Dpad for 3D games.
On the tradition al pads you have to press Down and Forward to get a Diagnol forward down, making 3D games a pain in the ass to play cuz you have to work really hard, but with the Sega D-oad you could press the diagonal button on the pad and go in that direction, making it a lot easier to control, now not as fine or accurate control as a true analog stick but a lot betetr than what the DS adn GBA are currently using. It would all depend on how willing Sega was to let Nintendo use thier D-pad and if Nintendo would be willing to admit their is inferior buy even asking for it.
Its one of those little tings that gets often ovr looked on Sega Systems, sadly just like everything else Sega did that was great.