Goku

Goku is one of the playable characters in Dragon Ball Z: Kakarot.

Saiyan Saga
A Saiyan warrior born on Planet Vegeta and sent to Earth as a baby. His Saiyan name is Kakarot, but he was given the name Goku by his adoptive grandfather Gohan, from whom he also learned martial arts. After Gohan's passing, Goku spent his days alone in the mountains until visited by a young girl in search of the mystical Dragon Balls. Being a Saiyan. Goku is capable of transforming into a Great Ape provided he has his tail. In order to prevent Goku from ever transforming again, Kami removed the tail. There's still a small chance it will eventually grow back though it seems it won't if a Saiyan becomes as strong as Goku.

Frieza Saga
After witnessing Frieza brutally murder his best friend, Goku exploded in a fit of rage and became the legendary warrior said to only appear once every thousand years: a Super Saiyan!

Cell Saga
Goku was transported to Planet Yardrat when he narrowly escaped from Namek's destruction by taking an abandoned Ginyu Force space pod, which was programmed to arrive on the faraway planet. Goku quickly befriended the Yardrat, who taught him the incredibly useful Instant Transmission technique. They also provided him with a Yardrat Outfit. though Goku's not exactly a fan.

Majin Buu Saga
Goku won the 23rd World Tournament by defeating Piccolo jr (Piccolo), but once Mr. Satan won the tournament 11 years later and developed a large legion of fans. Goku's name fell into obscurity among tournament goers and combatants. Goku couldn't care less, though. As long as he's able to keep fighting strong opponents, he's happy! Goku transformed into Super Saiyan 2 when confronting Vegeta, then powered up by Babidi's evil magic. Previously, only Gohan had achieved this form during the Cell Games, but after losing his life when Cell self-destructed, Goku continued his training in the Other World and finally achieved the form himself. This form is roughly twice as strong as a Super Saiyan, and generates sparks around the body. Goku transformed into Super Saiyan 3 when attempting to prevent Babidi and Majin Buu from attacking West City. It boasts power four times as strong as that of Super Saiyan 2, but it puts an immense amount of stress on the body, making it better suited for use in the Other World.

Consecutive Energy Blast

 * Consecutive Energy Blast - A manually aimed Ki volley with homing properties, making it easy to connect hits. Can be used against multiple enemies.
 * Super Consecutive Energy Blast - Upgraded form of the Consecutive Energy Blast. Ki Blast quantity and damage are increased.
 * Ultimate Consecutive Energy Blast - Upgraded form of the Super Consecutive Energy Blast. Ki Blast quantity and damage are increased even further.

Kamehameha

 * Kamehameha - Unleashes charged Ki as a devastating beam. High Ki consumption for high damage.
 * Super Kamehameha - Upgraded form of the Kamehameha. Damage is enhanced.
 * Guided Kamehameha - Upgraded form of the Kamehameha. Follows enemies.
 * Limit Breaker Kamehameha - Upgraded form of the Super Kamehameha. The user surpasses conventional limits for a decisive, one-hit Super Attack.

Spirit Bomb

 * Spirit Bomb - Gathers Ki into a gargantuan orb, then drive it straight into the opponent. Though a massive amount of Ki is required, tremendous damage is dealt.
 * EX Spirit Bomb - Upgraded form of the Spirit Bomb. Damage is enhanced.
 * Super EX Spirit Bomb - Upgraded form of the EX Spirit Bomb. Damage is further enhanced.
 * Ultimate Spirit Bomb - Upgraded form of the Super EX Spirit Bomb. Damage has been enhanced to levels capable of obliterating an entire planet.

Scissors Paper Rock

 * Scissors Paper Rock: Rock - Melee attack. Leaves enemies vulnerable if it connects. High guard break damage.
 * Scissors Paper Rock: Scissors - Melee attack. Temporarily immobilizes enemies if it connects.
 * Scissors Paper Rock: Paper - Melee attack that boasts high damage.
 * Ultimate Scissors Paper Rock - Consecutive melee attacks that deal high normal and guard break damage.

Body Impact

 * Body Blow - A bone-shattering melee attack. Leaves enemies vulnerable if it connects. Boasts high stun damage.

Meteor Smash

 * Meteor Smash - Sends enemies hurtling into the ground. High guard break damage.
 * Impact Strike - Consecutive melee blows that deal high stun and guard break damage.

Dragon Hammer Strike

 * Dragon Hammer Strike - Powerful consecutive melee attacks that deal high normal and guard break damage.
 * Dragon Fist - Ravages foes with a lethal melee strike. Though a large amount of Ki is required, damage is massive.

Kaio-Ken

 * Kaio-Ken - User gains support effects. Raises damage dealt, but you slowly lose HP over the course of the battle.

Super Saiyan

 * Super Saiyan - User gains Support effects. Raises damage dealt, but you slowly lose Ki over the course of the battle.
 * Super Saiyan 2 - User gains Support effects. Raises damage dealt, but you slowly lose Ki over the course of the battle.
 * Super Saiyan 3 - User gains Support effects. Raises damage dealt, but you slowly lose Ki over the course of the battle.