Teeny tiny addition to start off today (though someone may have already contributed this):
<game name="Daimakaimura (1990)(NEC Avenue)(JP)">
<description>Daimakaimura (1990)(NEC Avenue)(JP)</description>
<rom name="Daimakaimura (1990)(NEC Avenue)(JP).pce" size="1048576" crc="b486a8ed" md5="6d9ff6f70608166c88fd2553d44ca17a" sha1="cab9e4a1a8b6da07cc2c5cc35949928199a417ee"/>
</game>
The SuperGrafx only had 5 games officially released for it (not including the 2 SuperGrafx-enhanced games, Darius Plus and Darius Alpha), so may as well have them all!
Updated DAT:
https://mega.nz/file/qCIDUAqD#Txt7_jpUXo6BJJCab4Izq6D056NqgQ5XM4hSUgMr7T4ROM can be found in No-Intro/MAME SL.