Gachinco Tennis S is a tennis battle game with flashy magical ball attacks that can be activated with a single button.

There are 24 characters with different magic and abilities. The game starts with 12 characters and others are unlocked by defeating them in invasion matches after winning in the tournament mode.

The game uses a tag team match with original rules, after selecting 2 characters it plays like a singles match but the characters can swap at any time during a rally. Seize victory by using two types of magic and swap characters depending on the situation.