A Surface to Air Tag Battle Team! (Japanese: 大空と大地のタッグバトル！The Tag Battle of the Sky and the Earth!) is the 99th episode of the Best Wishes series, and the 756th episode of the Pokémon anime. It aired in Japan on October 18, 2012 and in the United States on February 9, 2013.
While walking in the middle of a corn field, Ash and his friends come across a Drilbur. Then, Pikachu points out to a Braviary and Cilan then suggests that the Braviary is watching them. They continue to walk, only to be interrupted by laughter.
Suddenly, two boys pop out, and challenge Ash and his friends to a Tag Battle Ash then accepts, but Cilan and Iris are reluctant. Cilan asks for the boys to introduce themselves, which they do, stating their names are Soren and Rocko, and that they are brothers.
After hearing from Cilan that he is a Gym Leader and Ash is a would-be competitor of the Unova League, the brothers decide they want to battle them. Ash and Cilan respectively bring out their Unfezant and Pansage while Soren and Rocko battle with their Braviary and Drilbur.
Soren and Rocko amaze them with their dazzling combination moves, and they get Ash and Cilan cornered. But Ash and Cilan manage to come up with their own unique combination moves and ultimately win. After the loss,the brothers become crestfallen. Cilan evaluates their Pokémon, and comes to the conclusion that they need to catch a Water-type to gain mastery over the third aspect of the nature that comes after land and sky. To do so, Cilan goes with them to a river to fish. First they spot out a male and a female Frillish, but fail to catch either of them because of meaningless bickerings. Then they spot a Corphish and a Buizel, and using some perfect move-combinations, they taste the fruit of success. Ash and the gang congratulate them and part ways on good terms. After parting ways, Cilan, Ash, and Iris come upon a Swanna and a Palpitoad, and Cilan realizes that they would be the ultimate perfect match, one being Water and Flying, the other Water and Ground.