As we all know, the Bouncer codes in regions such as Europe and North-America were an exclusive pre-order bonus for a limited amount of time. These codes unfortunately expired back in April 13, 2019 making it impossible to obtain and renew.

However, in Japan they decided to opt for the Bouncer being a DLC you could choose to pay for instead of a limited pre-order bonus. This DLC is still up today on the Japanese PlayStation Network store! Unfortunately this only works on Japanese copies of the game, but if you want pick up any of the NewGame categories such as Any% and All Gold Bolts today then it's most likely worth getting a Japanese copy anyway.

Link to the JP version: https://store.playstation.com/ja-jp/product/JP9000-CUSA01686_00-RCPS400000000000 JP Bouncer DLC: https://store.playstation.com/ja-jp/product/JP9000-CUSA01686_00-000000000BOUNCER