Does anyone know how you're supposed to complete the quest where you go into the time portal and then fight grandpa gohan then you get goku from the saiyan pod... I give grandpa gohan the baby and then idk what to do after that... It's very confusing because it's all in korean anyone who has played the game know what to do in this quest?

After you had goku in you get the Charge Skill.
You use it to charge up RP and add a special buff to one of your skills by holding down the hotkey of the selected skill or right click it and hold it down.
You have to attack Grandpa gohan this way.

Ahh got it... took a while to figure out what the default key was for charging but it looks like it's "Z"... Thanks for the help man I would have been stuck on that quest if it had not been for you. ^_^