How they became SS

Goku SS-When krillin died in the frieza saga, Goku was pushed over the limit and became SS. SSJ2- SSJ3- SSJ4-

Gohan SS-Goku and Gohan train hard in the room of spirit and time that Gohan gets mad enough and pushed to the limit and goes SSJ. SSJ2-Mr. Satan rolls out the head of android 16 and 16 starts sayin stuff and then Cell comes over and shuts 16 up by "killing him" then gohan gets so mad that he erupts with power and goes SSJ2. SSJ3-Never achieves SSJ4-Never achieves

Vegeta SS-Out of pure exhaustion and training Vegeta goes SS SSJ2- SSJ3- SSJ4-

Trunks SS-Goes SS right after Gohan is killed by the Androids SSJ2- SSJ3- SSJ4-

Goten SS-Automatically at age 7 he goes SS. SSJ2- SSJ3- SSJ4-

Chibi Trunks SS- SSJ2- SSJ3- SSJ4-