There is conflicting information regarding the release date for Claymates for the Super Nintendo.
Wikipedia has the North American release date given as April 26, 1993 (and November 20 of that year in Europe), but the Super NES Master List hosted on Nintendo's official website has this as March 1994. Nintendo Power first covered the game in its January 1994 issue, a month after it covered the previous Interplay Clay-related game, ClayFighter.
~Ben