This might be a dumb idea, but I've gotten curious about injecting a ROM into J Legends Retsuden or a Virtual Console title.

[Konsento1]

So, I've been recently dicking around with homebrew, modding tools and all that.

Well, I found out that the Old series 3DS can handle most SNES and NES games pretty well (with a few exceptions), but I got curious if it's possible to swap the ROM of a VC title or something similar to J Legends Retsuden, Sega 3D classics, or Ultimate NES Remix.

At least with Ultimate NES Remix, Sega 3D Classics, and Virtual Console, it's just an emulator that has the ROM.

But according to some old posts, J Legends Retsuden might be a port, though one person claimed they went through the game and found the roms in the collection's code.bin, implying emulation.

 

[funstuff3929]

Some options:
Ultimate GBA VC Injector for 3DS.
New Super Ultimate Injector
Dedicated emulators or retroarch

This post explains some of the options better:
https://gbatemp.net/threads/my-2023-guide-to-new-super-ultimate-injector.631439/