It does look like what you think it is but fook knows how to do it!!!.........i guess you have to wreck an official cart to do it tho!!
ive got a game that i neva play which i couldnt care less if it got ****ed, so if anyones intreseted in givin it ago, i mite part wit it if i trust ya
Retail games are made with mask ROMs (cheaper to produce than buying/flashing flash chips)
ie prolly a modded pirate cart? Looks like a well done one tho (battery, sram etc)