Hi,

There is a guy in Poland selling Game and Watch mini classics dated 2014.

Are these genuine? I didn't know they were still making them.

Mini classic eBay auction

I brought the DKJ some days ago, and got it today. It is genuine product otherwise i would never have bought it

Mini Classics are rereleases of Game & Watch titles as well as a few originals.
Nintendo issued multiple companies to remake G&W titles.

These are legit, but the quality of them vary from manufacturer to manufacturer.

Example: I had a grey Super Mario which worked great.
I later got a blue one from a different company. There was now a pause and mute function, which is nice, but there's a glitch with the spinning platforms (rotating "fireballs") where if it moves from under your feet, you're floating in the air instead of dropping down like in the original G&W title.