Super Buu is definitely comical. His childish tantrums, odd behavior, and the way he reacts to situations often provide comic relief. However, it also depends on how you interpret his character and the context of the story.
In the fanfic, Bardock might be filled with pride. He could be thinking how his son has grown into such a powerful warrior. After all, Goku has come a long way from being a little Saiyan baby sent to Earth. Watching Goku fight Buu, Bardock might see all the potential he always knew Goku had, finally being fully unleashed.
In the fanfiction, Bardock might be in a state of awe. Goku's fight against Buu is no small feat. Bardock would likely note Goku's ability to keep getting back up, no matter how hard Buu hits him. He might also be thinking about the power levels involved. In his time, the power levels he knew were much lower. Now, seeing Goku take on a foe as powerful as Buu, he'd realize just how much the Saiyan race has evolved, especially with Goku as a prime example.
It could potentially influence Goku's fighting style. Bardock was a fierce warrior with his own set of techniques. Goku may subconsciously incorporate some of Bardock's fighting spirit or even mimic some of his moves. Also, Bardock's presence could be a source of inspiration for Goku, making him come up with new strategies on the fly during the fight against Buu in the fanfic.
His presence can add an emotional depth. It could be a moment of connection between father and son, even if Goku doesn't know Bardock is there. It might also serve as a reminder of Goku's Saiyan heritage.
In Dragon Ball Super, the Demon Buu was a very powerful villain with combat power comparable to the Super Blue Warrior. However, the author did not let Buu participate in the power conference because he wanted to show Buu's different side and show his confrontation with other characters.
The participants of the Strength Contest were all trained and strengthened warriors. Their combat strength was very high. However, Buu the Demonkin was not a trained and strengthened character. His combat power was far from that of ordinary people, so he could not participate in the Strength Conference.
In addition, there are some contradictions and problems in the story. His existence itself is a kind of contradiction, so the author does not want him to participate in the power conference, but hopes to show his existence and influence through other means.
I recommend the following novels to you:
1. [The Infinity of the Beginnings of Buu the Demonman]: The protagonist becomes Buu the Demonman and travels through many worlds, experiencing various adventure stories.
2. " Marvel's God-level Demon Man Buu ": The protagonist Chen Chen transmigrated to the Marvel Universe and obtained the ability of the Demon Man Buu. At the beginning, he obtained the Immortal Demon Body and began his devouring journey.
I hope you like my recommendation.
Majin Buu was created by the wizard Bibidi. Bibidi was an evil being who made Majin Buu as a weapon of destruction. Majin Buu was originally a pure and innocent being, but Bibidi's evil influence turned him into a rampaging monster.