It is possible to add scanlines and screen ghosting like the original Game Boy displays using the Super Game Boy / 2 by enabling a PPU register and interlacing bit.

Actually, it may be closer to that of the Game Boy Color interlacing display; if you're using a palette that matches the original handheld it really looks close to the DMG Dot Matrix display, minus the blocks.

Included are patches for all known Super Game Boy / 2 regions and revisions because addresses are slightly offset between versions.

Known limitations
-SNES sprites are not affected by mosaic settings as a result of a hardware limitation.
-The modification is compatible with the Enable OBJ_TRN mode patch.
-Mosaics effects do not function.
-Space Invaders Arcade mode is also not affected because the Super Game Boy / program jumps to a new program and resets the hardware registers.