Hey You, Pikachu! was a video game released by Nintendo after the popularity of Pokemon jetted off in Japan and America. Somehow Europe never got the game.
The game came pre-packed with the N64 Voice Recognition Unit simply known as the VRU. Basically it was a clunky piece of hardware that acted as a basic microphone.
It sure made your N64 more tangled up with wires you didn't need.
The game itself was a very basic Pokemon game meets The Sims. Your whole quest was to raise and interact with your Pikachu.
I never played the game, but I can imagine having a lot trouble getting Pikachu to understand me.
The game also came in a super-special edition with it's own Pikachu/Pokemon themed N64. I remember stores trying to give these away. Mainly because by 2001 everyone wanted anything but an N64.