Goku (Super Saiyan) is a very straightforward but very well balanced character. His combos are easy to learn, but leave a whole lot to master. His simple yet effective move set welcomes new players with open arms. He has his Dragon Flash Fist, which counts as an overhead, to catch crouching foes off guard. Not to mention, after using his jumping special attack in a mid-air combo, the light version will always connect, knocking the foe to the ground with greater damage dealt than simply using a jumping heavy attack.
Perhaps his most unique and useful utility is his 2S, or crouching special. At first glance, it doesn't seem like much. However, after a Vanish Attack, a quick crouching medium (2M) into standing medium (5M) into crouching special (2S) allows Goku to follow up a Vanish attack with a Super Dash, which most characters simply can't do.
If your timing is correct, Goku can use two Super Attacks in one combo. Use Super Kamehameha angled downwards to end a mid-air combo. Then, as soon as possible, use Warp Kamehameha. Both attacks should connect if the technique is performed correctly.
Goku arguably has the most versatile Kamehameha in the game. The fact he can fire it on the ground, up from the ground, in the air, and down from the air gives him amazing screen control.
Goku's assist is considered to be one of the best, if not the best assist in the game. (Tied with Goku Black, of course!) The Kamehameha allows characters to extend combos in nearly any situation, where many assists have a specific scenario they excel in.
Double Kamehameha Combo
This combo allows Goku to spend 2 ki meters and use two level one super attacks, but due to a nerf in season 2, this combo deals much less damage.
Basic Vanish Combo
As stated before, Goku is a master of the vanish combo. His crouching special attack allows him to push more damage into them than most other characters.