Gohan (DBXY)

Gohan was the warrior to combat Super Buu after Vegeta. He was the smartest Saiyan and the youngest Super Saiyan 2.

Power
His base power was enough to defeat Frieza. Super Saiyan can combat Buu. Super Saiyan 2 was enough to beat Super Buu.

Story
Gohan had his potential unlocked after Gohan defeated Cell. Gohan and Goku broke the Z-Sword, creating immense power. Gohan later returns to Earth,