There are only two episodes I think. They are "Held Captive" and "Captain Ginyu...The Frog".
Episode 78.
episode 226 No it is always Chi Chi.
Goku and Goku Jr. meet in the DragonBall GT movie, "A Hero's Legacy."
Goku SSJ4 is the most powerful super saiyan form that Goku can transform into
Goku kills him with a spirit bomb
Goku turns SS4 in Episode #35 gt.
The episode in which Chi Chi and Goku fight is episode 137. It's also the episode in which Chi Chi becomes Goku's fiancee.
Goku turn into kid Goku in episode 1 or Dragonball GT because Emperor Pilof accidentally wished for Goku to be a kid again.
its episode 162
episode 184
Goku never meets Bardock.
episode 235
episode 191 i think
episode 213
you want to know what episode goku's butt gets but on fire? if so its episode 77 of dragonball
goku learns the kamehameha on the movie path of power (Edit: Goku first performs a kamehameha wave in the 8th episode of dragon ball)
35. goku's ascension