This battle will begin with you fighting Captain Ginyu. He isn't terribly tough, and with Goku helping you, you should take him down quickly. When he falls to 20% HP, the battle will pause.
Recoome will appear, along with Krillin and Kid Gohan. Recoome can pack a punch, as his Super skills hit hard, even if they do take a second to go off. Keep that in mind when fighting up close to him. However, it's a 3v1, so you should be able to take him down. Once you do, finish off Ginyu and the battle will end.