Son Goku

Son Goku is the main protagonist to Dragon Ball.

Episode 2
A Flashback Bathing Scene of Son Goku as a baby is shown as he is struggling while his adopted grandfather Son Gohan tries to bathe him in a small Washtub.

Episode 61
Goku has a Furo session.

Episode 68
Bulma Brief has a Flashback of the time she bathed Goku.

Episode 125
Goku and Son Gohan attempt to take a Bath but Chi-Chi yells at Goku and forces him to get his drivers license.

Dragon Ball Z: The World's Strongest
He bathes in a Barrel.

Dragon Ball: Origins
Goku getting bathed by Bulma is recreated in this game.