Summary
-
Gohan's strength comes from the mentorship of Goku and Piccolo, sparking a debate over which finishing move suits him best.
-
For Gohan, adopting Goku's Kamehameha or Piccolo's Special Beam Cannon makes sense thematically, but creating his own move might be the best solution.
-
Gohan's unique potential allows him to create his own ultimate attack, fusing elements of both mentors to set himself apart.
Mentoring plays an important role in the overall story of Dragon Ballso much so that some of the main characters would go nowhere if they hadn't undergone sufficient training under the hands of Martial Arts masters. Goku, who is widely considered the strongest mortal in the entire multiverse, would not have even made it through the Saiyan Saga if it weren't for his many powerful and skilled teachers who were at the pinnacle of their respective arts.
Gohan is no exception to this rule as he owes his legendary strength to the two mentors he had over the course of Dragon Ball. However, this prompted the fandom to debate which of Gohan's teachers was the best and which final attack would be best suited to him. So, let's look at Goku and Piccolo's mentor roles in relation to Gohan and see which finishing move would be best for Gohan to use.

Related
Dragon Ball: Come Daima has seriously picked up the pace
Despite a rather slow start, the recent episodes of Dragon Ball Daima have really picked up the pace, making it a must-see for fans!
The Case of Goku's Kamehameha
Why Gohan should receive Goku's final attack
First appearance |
Dragon BallEpisode 8, “The Kamehameha Wave” |
---|---|
Debut date |
April 16, 1986 |
Story arc |
Saga of Emperor Pilaf |
Goku and Gohan have trained quite extensively throughout the series, the most noticeable of which was the time they spent together before the Cell Games began. More than that, though, is the fact that Goku is Gohan's father and, as a result, his inspiration to grow stronger and become a better man, so this can also be shown symbolically with Gohan inheriting the iconic his father's technique.
It will take you 50 years to learn the Kamehameha wave!
Furthermore, Gohan has displayed the Kamehameha as his primary Ki attack multiple times in the series, the main one being when he used it to defeat Perfect Cell. This also solidified the Kamehameha as his most iconic attack, making it the person to have used this move the most after Goku himself. While Goku may not have trained Gohan as well or as much as Piccolo, the Kamehameha is a perfect option for Gohan's most powerful move.
The case for Piccolo's special beam cannon
Gohan's most powerful attack
First appearance |
Dragon Ball ZEpisode 4, “Piccolo's Plan” |
---|---|
Debut date |
May 17, 1989 |
Story arc |
Saiyan saga |
When it comes to the debate of who Gohan's greatest mentor is, the answer for most fans goes to Piccolo. Although the initial portion of Gohan's training was violent and incredibly dangerous, the two eventually bonded and formed a sort of father-son relationship that remains one of The one from Dragon Ball the greatest friendships. With this parameter alone, the reason for Gohan using the Special Beam Cannon as his strongest move is quite strong.
If this had hit me full on, it would have killed me!
Additionally, Gohan's first finishing move was the Maskenko Ki attack, which was also created by Piccolo, so making the Special Beam Cannon his strongest move for the current iterations of his character is really in line with this trend of attacks . The whole conversation about Gohan's finishing move comes to a head with his strongest form, the Beast transformation, which appears to use the Special Beam Cannon as his most powerful technique to defeat the threat of the terrifying Cell Max.

Related
Dragon Ball: The explanation of each eternal dragon
Everyone knows Shenron, but what about the other wish-granting dragons that appeared in Dragon Ball? Here are all the Eternal Dragons in the series
The reason why Gohan has a unique finishing attack
How can it stand out
The third option here is that Gohan has a completely unique finishing technique that may have elements or inspiration from both of his past mentors. While he is undoubtedly a character shaped by his loved ones in terms of personality, Gohan is a unique fighter thanks to his insane potential, allowing him to bridge the power gap between himself and the strongest mortals in the universe with a fraction of the effort . Taking his strengths into consideration with the fighter he molded to become through the mentorship given to him by Goku and Piccolo, it would make a lot of sense for Gohan's new finishing move to be his own creation, just like Beast Gohan was.
My goal is a definitive form that no one has ever seen before!
There is a separate debate as to whether Goku or Piccolo is the better mentor for Gohan. While both of their signature moves, the Kamehameha and the Special Beam Cannon respectively, would make perfect thematic sense for Gohan to adopt as a new finishing move, the option for the young Saiyan to explore his powers to create his own technique is perhaps the improve. option among all.
Dragon Ball can be streamed on Crunchyroll.

MOREOVER
Dragon Ball: Who is Uub?
Uub was introduced at the end of the Buu Saga and received training from Goku himself. Who is he?