Just for testing purposes, I tried hacking some ROMs to work further - and to my surprise, it worked for 2 games (3 ROMs). WARNING: if you want to try this out, make backups of your ROM images and modify them! Also, this is definatly NOT the way to go in terms of emulation - it's pretty much just a mere test. Anyway, here my notes:
0085 - Jump Super Stars (J)(Trashman)
- Starts, shows company logos, hangs at ActImagine logo
Patch 4 bytes in ROM at 0x29654 to 0400000A to make game continue into intro video (not skipable) and otherwise mostly working, has some graphic errors & missing graphics, slow, hangs on error message when trying to save
0099 - Rockman EXE 5 DS - Twin Leaders (J)(WRG)
- Starts, press run several times, loads Capcom logo graphics into RAM, hangs on black screen
Patch 4 bytes in ROM at 0x84FC4 to 0400000A to make game run through intro up to starting new game, doesn't react to keypresses
0150 - Mega Man Battle Network 5 - Double Team DS (U)(MODE7)
- Starts, press run several times to get game to Capcom logo, hangs while fading in logo
Patch 4 bytes in ROM at 0x852A0 to 0400000A to make game run through intro up to starting new game, doesn't react to keypresses