Running Shoes

Running Shoes are a piece of equipment developed by the Devon Corporation. They were introduced in Pokémon Ruby and Sapphire and used in all standard Generation III games.

Once you receive them from your mother, they allow you to run instead of walk, by pressing and holding the B button. While there are a few places where you cannot run such as very tall, thick grass, most caves and routes, as well as some buildings, will allow you to run through them.

The speed at which you can run is about twice as that of walking, yet slower than the Mach Bike or Acro Bike. It seems that anywhere you can run, you can also ride.

In the manga

In Pokémon Special, Ruby has a pair of Running Shoes, given to him by his father, Norman, for his birthday. They, like the in-game ones, allow Ruby to run far faster than normal.