those are Japan exclusive famicom/gameboy games
the one to the right is sanrio carnival witch is a solid puyo puyo type puzzle game that was about ten bucks
the middle is kero kero keroppis big adventure
a really weird tile based puzzle maze game that's pretty good
the left one took me about a year to find a listing for a good price that was also being sold in my country
kero kero keroppis big adventure two is a very fun well maid Mario like platformer with a very catchy soundtrack
and the gameboy game is sanrio carnival two
witch is a completely different type of puzzle game and was co developed by Nintendo them selves
very weird unique puzzle game would recommend
all of them were about ten to fifteen bucks except the keroppi game in the middle
BTW if you want to get retro games cheep
Japanese copy's are mostly way cheaper that international copy's on most systems