I feel like I've looked pretty hard but maybe I just missed it? The Japanese version of Mystical Ninja Starring Goemon doesn't seem to be listed.
Distribution / Bar Code: 4988602027921
We aren't tracking Japanese games for N64 yet. We've added Famicom and Super Famicom games, but we are waiting to see how popular those are before adding additional Japanese consoles.
Mysical Ninja will be added when we add all N64 Japanese games
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