As far as I know, Hey You, Pikachu does require a mic, and it has to be the mic developed for the N64. Quest 64 is indeed pretty lame. It's literally a half-finished game. I don't know why they rushed it to market, but it could've been decent if they put more time in it, which they did with the Japanese release. It's strange that it came out in the US prior to Japan even though it was developed in Japan, but the Japanese version is a little more polished. My favorite game out of those is Mario Kart 64.