A rumor developed that Pikachu will get angry if the player says "PlayStation" into the microphone. However, Pikachu does not react to it as the word is not listed in the game's word bank.
This is the only Nintendo 64 game released in North America to use the Voice Recognition Unit.
Hey You Pikachu is considered to be the worst Nintendo 64 game of all time right next to Superman 64 due to the fact that most of the time Pikachu doesn't respond to the microphone voice commands very well and ignores the player.