I also have those six Keshi which I'm assuming are from the same series?
@m5jagdragonpanzeriv, I also have a few of these figures and don't know exactly what series they are from. The copyright markings on the back of the figures indicate that they were made by a company who's name starts with a "B.", so I always thought they were Bandai, though it could be Banpresto. According to Dragonball.wikia they come from Diorama Keshi Series. The description says,
"This unique duo pack keshi series features characters along with a background image that is a cardboard fold-out, allowing the Keshi pieces to stand on top of the base and have a unique background image depicting the atmosphere in which the scuffle took place."
Since the info is from a wikia I don't know how reliable it is or how accurate the name of the series is. I don't think I've ever seen a full set or the fold-out background images for these.
princezarbon please don't quote each time you post (and especially don't quote multiple images), it makes clutter I don't like to clean up (particularly via my phone). Just reference the person either by tagging them with the @ symbol or make reference to what the person said.
That display card is from the Micro-Cross line of gashapon. While those are not specifically Micro Fighters, they are smaller figures that fit into the Cross-Up line. The Cross-Up line were keshi figures with plastic clothing/armor that would clip on over the figure.