About Mr. Gimmick

NES-G8-SCN, 0-20763-11019-8, published in Scandinavia.
NES-G8-UKV never published in the United Kingdom. prototype only
RET-GK-GBL reproduction cartridge.
SUN-GMK-6200 4907940100615, Famicom version published in Japan.

ギミツク is not the correct Japanese spelling. Yet it is such a common misspelling that it produces slightly more search results for this game on Google. ギミック is the correct spelling.