The Tennis Ball is an uncommon pettoy in Adopt Me! which is available in the Pet Shop for 200. It can also be obtained by trading. Being a pettoy, this item serves no purpose besides being a fun toy for players and pets to play with.
When a player interacts with the Tennis Ball, an equipped pet will chase after it and bring it back, similar to most throw toys. It makes a squeaky sound and plays animated effects when thrown.
The Tennis Ball features a bright-yellow ball with two white curved lines around either side, based off of a real tennis ball.