Old Running Boots
From Pixelmon Wiki
Old running shoes make the player's walking speed 1.5x faster when worn. They have the same durability and armor protection as Leather Boots. Old running shoes can be crafted into new running shoes with 2 diamonds, 2 iron, and 2 feathers.
Bugs
Old running shoes boost speed when held with other boots worn. This bug does not apply to New running shoes.