Four prerequisites had to be met to successfully transform into Super Saiyan 4.
1. You must possess Saiyan blood.
2. You must have a sufficiently powerful body and base battle power.
3. You must have a Saiyan's distinctive tail.
Note: Regarding point 3, if you have no tail, exposure to exceptionally intense Blutz Waves can stimulate your body and override this requirement.
4. You must master the technique for transforming into Super Saiyan 4.
At present, Trunks only met the first and second requirements.
Now, Son Gohan was going to help Trunks fulfill the third!
Even Dende could exploit the body's regenerative properties and force Trunks's tail to grow back with a Healing Spell. Naturally, it was no trouble for Son Gohan.
Son Gohan reached out and tapped Trunks between the eyebrows.
A vast surge of restorative power poured into Trunks's body.
Trunks's face instantly flushed bright red.
He felt unbearably bloated, his body swelling little by little like a balloon.
Trunks gritted his teeth and endured it.
Soon, he felt an itch just above his rear, as though millions of ants were crawling there.
That was where the base of his tail had originally been.
As the itching grew more intense, Trunks's swollen body began returning to normal.
The power seemed to have found an outlet, all of it rushing toward his tail.
Son Gohan thought for a moment, then joked with a laugh, "Hahaha, you'll have to cut a hole in your pants from now on."
Trunks's face reddened again.
Sure enough, a large bulge soon formed in the seat of his pants.
His furry tail had grown back.
Fortunately, this combat suit was very stretchy, so Trunks felt no discomfort.
He quickly cut an opening in his pants and let his tail out.
Unlike Son Gohan's black