In one bonus storyline in Dragon Universe, Vegeta goes behind a bush so he can do a Fusion Dance with Goku without being seen "dancing around like a fool." Goku mistakes him for... taking care of business.
Goku: Well, when you've got to go, you've got to go.
Saiyaman...justSaiyaman. His ultimate is merely him introducing himself and pulling off a pose! Do it right and he gets an attack boost. Screw it up and he looks ever so stupid.
The What If? in the first game where Cell accidentally absorbs Krillin. Made even funnier by the fact that his is the onlyWhat If? where the villain loses. And then it turns out it was just a nightmare Perfect Cell was having during the 10 day Cell Game waiting period.
Yamcha goes up against Cell after he's been weakened by absorbing Krillin... and stillloses.
One small one in Frieza's What If? after killing Goku. He's standing there panting, then grins and scoffs...and it turns out after all that, the only damage Frieza truly suffered was a single lost tooth.
Goten's winpose after beating Videl. He looks so adorably concerned that Gohan'll be angry at him.
The way some pre-fight dialogue can match up even if the characters don't have special intros. case in point...
Majin Buu: Do you like chocolate? or Yamcha: Think you can handle this?
Kid/Teen Gohan: I'll give it a try!
Some of the special intros, especially...
Goten: (dancing around) Shenron, I want candy!
Omega Shenron: (Folding arms, not amused.) I don't grant wishes for candy!
On the subject of failed attacks, if you fail Yamcha's Spirit Ball attack, his opponent will dodge every hit, then the Spirit Ball will outright spike the poor desert bandit in the face.
Hercule is just as much as a hoot in the Budokai games as in the anime: each and every game here turns his giving a bomb-laden handheld video game (as seen in the Buu saga) into one of his Ultimates. Budokai 2 gives him a move where after failing to flinch them with an attack, starts sucking up to them, distracts them with the "LOOK OVER THERE!" gag, knocks them down and puts a camera and tripod up before planting his foot on their prone body, getting a photo from it. Budokai 3 skips straight to the good part.
"Risking It All For A Friend" can be applied to every character in Burst Limit, meaning you get such iconic moments as Goku being saved by Broly. Additionally, this can be applied to Raditz so he saves his dear beloved Kakarot's life at the cost of his own and what's Goku's response?
Super Buu in Budokai 2 has Absorption as his ultimate, where he absorbs either Piccolo, Gotenks or Gohan for a power boost and new Ultimate. In Budokai 2 he can also absorb Vegeta, Cell, Frieza and Tien and Yamcha simultaneously. The funny comes from when he absorbs Tien and Yamcha, getting a new form with Tien's outfit and Yamcha's scars...and a drastically lower power level since he shouts out a disappointed "No!"
And if you look in practice mode when you do it, you'll see that Buu's power decreases (instead of increasing when he does other characters) when he absorbs the two.
Another funny little note is each victim's Oh, Crap! reaction to Buu about to absorb them...except for Vegeta in 2, who barely turns to even look at the bit of goo about to engulf him.
Super Buu even mimics the tone of the character he's stolen the ultimate of. It can be fun to hear him put on a raspier, airy tone while using Death Ball, or a hammier, grandiose baritone-approximation for Spirit Bomb.
This gem when Cell does his Spirit Bomb ultimate in Budokai 2 and 3 onward, which led to jokes that Cell's Spirit Bomb was weaponized from the collective stupidity of humankind:
Cell: Okay, planet, gimme that stupid energy!
Alternatively, if you use the Spirit Bomb in the first Budokai game:
Cell: THANKS FOR THE ENERGYYYYYYYY~!
In Budokai 2 during Krillin and Android 18's second dialogue in Dragon World, Krillin shouts at the top of his lungs that he loves her and asks her to be his girlfriend. Shocked, 18 rejects his offer, but tells Krillin that he's not afraid of the direct approach.
The PAL version of the first Budokai had some hilariously awful subtitles; the emotional impact of Cell killing Trunks is all but destroyed as Vegeta yells "Oh you Aunt Sallies!!"
Goku's different reactions to the various Saibamen encountered during Budokai 2's Dragon World mode.
In Budokai 3, if you lose the button press sequence during Videl's ultimate move, then Gohan accidentally knocks the opponent into her. His response is to high tail it out of there!
Justice Phoenix - Great Saiyawoman's ultimate in Infinite World - starts with her getting spiked down at the ground by her opponent, same as ordinary Videl's ultimate. Except instead of getting caught by Gohan, Videl just splats against the ground a laa certain cartoon coyote. What sells it is the springing sound effect that happens upon impact.
The sheer fact that in this game and unlike in most DB games he's in, Mr. Satan's attacks cause hitstun without the need for any sort of buff item at all (for balance reasons but still.) With clever play you can have him thrash Perfect Cell just like he always said he did, and even take the fight to the likes of Broly, Frieza, final form Baby or Omega Shenron and legitimately win. Then it becomes funny all over again because Mr.Satan just legitimately beatBROLY.
The first Budokai game has the "Legend of Mr. Satan" mode which, expanding on above, is Mr. Satan taking on the entire Cell Games roster ending with Perfect Cell himself. And before every fight, Satan taunts his next opponent... while internally monologuing about how potentially screwed he is. And the ending makes it straight up clear that, thanks to player input and game balance, Mr. Satan just beat Cell!
