The blue shell...everyone's worst enemy int he world of Mario Kart. Some people love it, others claim it ruins the game. None other than Masahiro Sakurai has taken to his Famitsu column to discuss the hotly-debated item. You can read a snipped of the translated feature below, courtesy of SourceGaming.
In the Mario Kart series, there is an item called the Blue Shell. Everyone likes this item, right? Or maybe they don’t. As someone who plays games, I’m honestly not a big fan of the Blue Shell. However, for the type of game Mario Kart is, it’s an essential item, so I accept it. If that’s the way it has to be, then I guess it’s fine.
Sakurai goes on to explain the blue shell in great detail, talk about why it's so necessary to have in a game like Mario Kart. Read up on the full feature here.