Around 1996, as the Sailor Moon anime ended its United States syndicated run, the anime was getting some speed in South America. in the Mexican edition of Club Nintendo in issue 3, Vol 5 (dated March, 1996) same issue that had an unreleased English version of Dragon Ball Z: Super Butoden 2; there was a small preview of the game at the end of the issue for a full-on look at the game in the following issue. According to the preview blurb, it would have been released exclusively for Latin American countries by Itochu. The game in question would have been the early SNES/Super Famicom game release by Angel and Arc Systems Works in 1992, and then by Bandai in 1994 in France.
The next issue was published and nothing was shown. It was mentioned in the same ending column that they will indeed look into the game the next month.
Unfortunatly, nothing was mentioned in the following issue and ever since.
As far as existence goes, it's unknown other than these scans and the info that was given in those scans, it could very well be the people who put the preview together where either handed the Japanese or French version of the game and been told that version would be coming to Latin American countries later that month or so fully translated, or there is a American Spanish, American Portuguese or even possibly an English version of the game that has never seen the light of day...