A few of these I can elaborate on:
Astro Robin Hood is an obscure JRPG with a "Robin Hood IN SPACE" theme. Like many RPGs of the era, it's mostly a Dragon Quest clone, but you can a build a party of out several available Merry Men.
Star Trek - The Atlantis Bone is a Japan-exclusive Star Trek game, framed as if it were an episode of the Original Series. Some claim the story comes from an unfilmed TV script for the show, but this has never been confirmed. Japanese fans say it represents the show better than many of the other Star Trek games of the era.
Insection - The Arcade Game is based on a bug-themed space shooter made by an obscure European dev. Oddly, the actual arcade game was never finished or released, as the games were developed concurrently and the arcade version was canceled due to financial issues.
Metal Fighter Blaseball - An oddly misspelled baseball game with a sci-fi theme, similar to Base Wars. Some cute sprites based on tokusatsu characters and aliens, but otherwise a pretty standard baseball game for the era.
Nigel Mansell’s Font Fighting - Japan-exclusive "action education game" meant to teach kids English and to improve handwriting. Borderline unplayable. No is sure who Nigel Mansell is. EDIT: While some assume the title refers to the race car driver Nigel Mansell, the game doesn’t feature driving a tall, nor does it have Mansell’s likeness, so your guess is as a good as anyone’s.
Fourteen obscure NES/Famicom ROMs that were never released in North America, according to a neural network:
Power Punker (Europe)
Business Gaiden (Japan)
Astro Robin Hood (Japan)
Entity Rad (Europe)
World Championship Shting (Japan)
Star Trek - The Atlantis Bone (Japan)
Insection - The Arcade Game (Europe)
Captain Player Earth (Japan)
Magic Dark Star Hen (Japan)
Murde - The Fingler’s Quest (Europe)
Metal Fighter Blaseball (Japan) (Rev A)
Smurf the Edify (Japan)
Skate or Space Dive Bashboles (Europe)
Chack'van, Ultimate Game of Power Blam (Japan)
Nigel Mansell’s Font Fighting (Japan)