That would be Beach Spikers, an arcade game made by by SEGA's old AM2 team and released exclusively on the GameCube.
It was a great four-player game, and even the single-player modes were fairly interesting, since there was a metagame going on where your AI partner would play better or worse, depending on how you treated them between points. You could choose to yell at them, console them, encourage them, or remain silent.