Hidden Conditions
For the first part of the quest, you have to take out Krillin, Yamcha, and Tien. They should be easy enough, especially when you have two other allies. If you're using the default Goku, Yamcha will have a special dialogue with him while fighting. Also take note that this one of the missions where you can farm Hercule Badges, which is worth a fortune when sold. Refer to this low level Money Farming tip.
After defeating three of them, the gate leading to the next area will open. Head there and face Kid Gohan, and Piccolo. You'll be facing the fierce kid Gohan first. Deplete his HP to 30% and Piccolo will join the fray as well. Be careful of Piccolo's ultimate ki blast attack since it deals heavy damage. Prepare to use Energy Capsules if necessary. If you managed to defeat them both fast enough, Goku will appear and you have to defeat him as well to secure a high rank in the mission.
how the hell do you unlock this quest it isn't showing up for me
Goku refuses to show up. My fastest time is about 1:54. What's going on?
kill piccolo first before gohan
it doesnt matter who you kill 1st as long as gohan and picollo die by an ultimate attack, the chances of goku spawning increase to about 50%