The Wave Badge is a common pet accessory in Adopt Me! that was released as part of the World Oceans Day update. It was obtainable in the WDC (Whale and Dolphin Conservation) Pin Badges Board for free.
It was displayed on a wooden board along with the other WDC Pin Badges. A player can attain a maximum of one pin badges every hour. This pin, along with the other ocean badges, was released on June 8, 2021 and left on July 8, 2021. As it is now unavailable, it can only be obtained through trading.