Vegeta
at first no, but Trunks comes back in time from the future to give Goku the antidote
episode 286
Goku was 14 when Bulma was 16 Goku was short at that time
Goku wins, but he gets help from Yajirobe who cuts Vegeta's tail off which makes him become normal again.
there is a japanese special that depicts goku traveling through time with krillin and gohan , bulma and trunks.....the first scene he sees kid goku from dragonball....im currently trying to find a subtitled version in english.
He doesn't while fighting the first time because that is before the cell he faces Cell. He is already died the second time Broly comes back so Gohan beats him with Goten and Goku but Goku his not really there.
Goku becomes super saiyan 2 when he is training in a special room at Kami's lookout. It allows a year to pass in the room, while real time in the outside world is just a day. He acheived SS2(Super Saiyan 2) right before he battled cell. So did his son Gohan. Even though Goku was stronger than ever at that time, Gohan was stronger than Goku, achieving SS1 and SS2 in the special room. Gohan was the first one to go SSJ2. Goku became an Ultimate SSJ in the Hyperbolic Time Chamber. Goku went SSJ2 for the first to battle Majin Vegeta, which was about 7 years later. Gohan went SSJ for the first time in the Time Chamber, and SSJ for his fight with Cell.
Goku did it first then Chi-Chi
Super Sayin 3 is his last, or you could consider his ape form it when he's fused with Vegita.
"Roar" by: Katy Perry
Well goku meets Goten but Goku was still dead at that point Goku was giving time on earth and Goten and Goku meet each other. The Goku has to leave but in the middle of the majin buu saga the the supreme Kai wishes him back to life to fight majin buu which he wins. (Goku leaves because he is out of time on earth)
Yes, and No. Bulma was with Goku since he was a kid, and she was in her teens. She may have looked after Goku through their adventure, but I more or less think Goku passed values onto her because when they first meet Bulma is extremely selfish. As time goes on you see her slowly begin to become compassionate towards her friends.