There are no active Piggy codes as of this month. If promo codes are issued in Piggy, you can expect Piggy Tokens, in-game currency as the primary reward.

[2] MiniToonTokens: Earn 5 Piggy Tokens. How Do I Redeem My Codes? Unfortunately, since the developers removed the code feature from the game, Roblox Piggy Codes cannot be redeemed.