The denim jacket is an item of clothing in the World Championship video games. It can only be worn by male players. The female alternative to this is the one-piece outfit.
In Yu-Gi-Oh! 5D's World Championship 2009: Stardust Accelerator, the denim jacket is available from the start.
Reverse of Arcadia
In Yu-Gi-Oh! 5D's World Championship 2010: Reverse of Arcadia, the denim jacket can be purchased from Chihiro for 5 Star Chips.