Unless the game supports save on the DUO like Neutopia i think did they are all password. I use save states or FINAL LAP TWIN would be impossible giving out false passwords. My friend left his turbografx on for a week trying to beat that game back in the 90s. We played it together again in 2005, got to the last race, I was missing a part and I couldnt beat the last guy and my friend (who had TG16 a decade before me) threw his arms up in the air and said "F*** THIS GAME, IMPOSSIBLE" lol i know he was just overreacting, im playing through it again slowly
NECROMANCER is being translated as we speak and I cant wait its a gorgeous game.
Sinibad I personally got halfway through the game, was even making a walkthrough , but its so simple it needs to be in english to be enjoyed. Typical Dragon Quest clone with an Arabian Nights theme. You even get ALI BABA prince of thieves in your party
I HEARD Susano Densetsu is being translated since 2009, cant verify though.
Out of those, Susano and Necromancer outshine Sinibad just because Sinibad is your typical RPG