When this mode is enabled, nds-bootstrap forces the 3DS to treat Pokémon Black 2 as a DSi game, triggering the DSi binaries.
If you are developing a ROM hack (like creating custom mechanics or adapting the game for a custom engine), you need to dump and disassemble these binaries. Tools Required
Are you using a (like an R4) or SD card (with TWiLight Menu++)? Pokemon Black 2 Dsi Binaries
These were the ghosts in the machine. Code written for hardware that, for most players, remained dormant until the 3DS came along.
The "Memory Link" feature (connecting your Black 2 save to a Black/White 1 save) can sometimes feel faster when utilizing the improved system capabilities of a DSi. Region Locking When this mode is enabled, nds-bootstrap forces the
Pokémon Black 2 and White 2/DSi features | Pokémon_NJ Wiki
If you are emulating Pokémon Black 2 on PC using or DeSmuME , DSi binaries are relevant only if you want to experience DSi-exclusive features. Most emulators default to DS mode, which is fully playable. To enable DSi mode in melonDS, you must provide a valid DSi firmware dump (NAND) and set the emulator to DSi mode. Without these files, the emulator cannot execute DSi binaries. These were the ghosts in the machine
In TWiLight Menu++, ensure the "DSi-mode" settings are enabled for the game.
W2FC (Nintendo Wi-Fi Connection) advanced security protocols (WPA/WPA2 support). Utilizing the DSi's camera for the Xtransceiver feature.
The DSi’s CPU runs at 133 MHz (compared to the DS’s 67 MHz), leading to faster menu loading in the Pokédex and Bag.