Weird cartridge.

Apparently it's real.
https://youtu.be/kkjtNpP2dwY

OK about the video (taken from an old VHS "All about MSX" tape). But I have serious doubts about the cartridge presented here ;) Currently trying to figure out the price that this cartridge would reach on eBay if it was real :)

EDIT: And you're a graphic designer right :) ?

More info here

https://ja.wikipedia.org/wiki/%E3%83%86%E3%83%A9%E3%82%AF%E3...

MSX2版
1989年4月発売予定でアナウンスされていたが、発売中止。フォーメーションエディットも搭載されるなど基本的にファミリーコンピュータ版に準拠した内容だったが、当時の雑誌媒体に掲載された画面写真ではファミリーコンピュータ版でカットされたエレキングやメガロも登場していた。

MSX 2 version
It was announced in April 1989 and scheduled to be released, but it has been discontinued. Although the contents were basically based on the family computer edition, such as being equipped with formation edit, screen shots published in the magazine media at that time also included Eleking and Megaro cut with the family computer edition.

It's artist's work but a picture of floppy disk would have been more credible.
The joke was spoiled for me because the image was not displayed when I looked yesterday.

Just one friend that was still curious if it was real or not. The label is from the FAMICOM / NES version, I just removed the "FAMICOM" text in katakana on the original image.

And the cartridge image was an F-1 Spirit cartridge.