Those who subscribe to the Nintendo Switch Online service have been receiving three new Nintendo Entertainment System games every month since it launched, with a few extra "SP" editions of previously released games also added on, which are either much easier or much more difficult than the base version of the game.
It seems that subscribers outside of Japan will be receiving one fewer game than normal in January, as Nintendo Switch owners in Europe and the United States of America will only be receiving two games this month, while Japan is receiving three.
Nintendo Switch Online subscribers in Europe and the US will receive Blaster Master and Zelda II: The Adventure of Link in January, while Japanese subscribers will also be receiving Joy Mech Fight.
Blaster Master and Zelda II are two of the best games on the Nintendo Entertainment System, so their inclusion on the Switch is welcome, but it's a still a disappointment for Nintendo to already start diminishing the number of games that they give away every month.
Joy Mech Fight was a Japan-exclusive fighting game for the Nintendo Entertainment System and its inclusion on the Nintendo Switch Online service is likely due to the fact that the main character, Sukapon, is an Assist Trophy in Super Smash Bros. Ultimate.
The fact that there is no English-language version of Joy Mech Fight is most likely the reason it's not being included on the international Nintendo Switch Online service.
Those who create a Japanese Nintendo Switch account can download the Famicom version of the Nintendo game downloader, which would allow them to play Joy Mech Fight by loading it using an account with a Nintendo Switch Online subscription. It's up to each gamer to decide whether they want to go through the hassle of setting up a new account for a game that is in Japanese.
It's possible that Nintendo might give us a few extra "SP" games this month as a way of making up for the deficit, as they usually don't announce them beforehand, but we'll have to wait and see.
Blaster Master and Zelda II: The Adventure of Link will be free to download for subscribers of the Nintendo Switch Online service on the 16th of January. Joy Mech Fight will also be available to download on the Japanese Eshop on the same day.