Here's a little piece of Nintendo trivia for you. If you played Mario Kart DS on a traditional DS, you would hear Mario shout "Yahoo!" when you loaded the game up. If you played it on DS Lite, DSi, 3DS, or Wii U, you'll instead hear Mario say "Here we go!". There doesn't seem to be an explanation as to why this change was made, but you can see the proof in the video above.