Been checking the site's FDS library. Found a few duplicates:
Suishou no Dragon and Crystal Dragon are the same game. The Crystal Dragon page even has an alias for the former's title, and way more information/pictures besides, so that's the keeper. However, since the game was never released outside Japan, the page ought to retain the name Suishou no Dragon with "Crystal Dragon" as an alias.
Finally, we have separate pages for Yume Kojo: Doki Doki Panic (the title of which ought to be edited, since we don't allow accents in page titles. Unless we do now?) and Super Mario Bros. 2, the well-known US/EU Mario game that was based on it. I'd be fine with keeping them separate, but people might want to fold the first into the second because there aren't too many differences beyond cosmetic changes and how the game's progression works. This has probably been argued to death, though, so feel free to ignore the merging request. At any rate, there shouldn't be separate pages as well as a Release on the Super Mario Bros 2 page for Doki Doki Panic.