There are a lot of gags here and there, but mostly the short stories (especially the ones with Angus) are hilarious, and most of PKNA #15.
Also, the short stories dedicated to the Evronians.
One was dedicated to Evronian sayings, corredated with pictures. Among them there were Running Gags about the Gophos and its horrendously stinking breath (first of all: "You don't look in the mouth of a gifted Gopho... 'Cause its breath stinks!". The picture shows an Evronian puking after accidentally looking in the mouth of a gifted Gopho) and about sayings involving the Emperor, only to have the picture disprove them while the Emperor commented "Popular sayings... Tsk!".
Then the Emperor's running gag was broken by having sayings that praised the Emperor (which the Emperor approved)... And then it was revealed their source: Ministry of Propaganda workers trying to get a promotion.
A short story from the Ultimate reboot has PK believing that Uno has decided to use the Wax On, Wax Off method of training. He didn't (PK accidentally knocked some water off, and Uno made him clean that). Uno passes the former half of the story going "What the..?" as PK does chores by himself, and the latter half exploiting thisto make PK clean everything. And then he starts the actual training...
Uno:By the way... try not to make a mess.
That one story where Everett's master hermit places him in a Secret Test of Character to see if he can keep his destructive nature in check. "If a dragon refuses the challenge, he may be lazy. But if he ignores the fly, he really is asleep". After passing unharmed through a few accidents, building a crane contraption without somehow turning it into a weapon of mass destruction, and repelling a "bandit assault" without harming them, the response is... "We don't know [if you passed the test]. You still have to take the challenge". Cue psychotic breakdown. And then...
Everett (Brother Sleeping Dragon):May I now know just WHAT is this challenge?!?
Prior:Isn't it obvious, Brother Short-tempered Dragon? This was the challenge
Everett:(with a gloomy face) Groan. Better meditate some more.
Two stories from the 1998 Special. The fight with Lord Walrus, which rips off at least Spider-Man and the Penguin, and Scrooge losing sleep at the tought of the Ducklair Tower having a possible secret floor (and losing the chance to rent it). By the end, PK would prefer to just smash his head with his shield and get over with it.
Lord Walrus returned in another special, this time with crab-themed powers. He unveils his special weapon, an horde of hypnotized fish... that is promptly dispatched by an horde of cats.
And just a few panels later, PK finds a map of the ship...
Paperinik: If only I could read this...
Evronian Soldier: You are here. Wrong place, wrong time.
Paperinik: (Uses the paralizing ray on him) Thanks for the information! Who said Evronians aren't gentle?
PKNA #36: Paperinik travels aboard an Evronian spaceship. Said ship is piloted by an A.I. with maternal istincts, who treats him like a 1950's housewife would treat her husband. And keeps on calling him "Deeear".
Xadhoom's appearance in the 1997 Special, Missing, has a group of Evronians dress up as Xerbians to fool her into wearing a power-locking helmet. Xadhoom immediately proposed a Xarghon, and when they didn't know what it was she saw through the ruse... And had the Evronians try and guess what a Xarghon was to keep the cover. When they finally caught on, one of the Evronians asked what the hell is a Xarghon. Xadhoom explained it's the traditional Xerbian welcoming dance, that every Xerbian learns as a child... And then blew up their cruiser.
Another short story on Missing had two Evron soldiers try and track PK on Earth. In order, this is what happens: they crash on arrival, wrecking their flying disks; they try and rob two delinquents of their clothes, but get beaten up; they try and steal the clothes of an old lady, but find out their weapons are broken and one of them is bitten by her dogs; they nearly get an heart attack when they encounter Urk (at least he doesn't beat them up); as they run away from Urk they stumble on the same two delinquents and the rest of their gang and get beaten up for trespassing; they finally find PK and try and catch him, only to discover it's an advertisement sign and get electrocuted in the process; they stop resting but accidentally trigger a car alarm, and have already wrecked the car to make it stop when they discover it's the car of the same two delinquents from earlier, who force them to beat each other up (their teeth had already scratched the studs on the bracelet of one of them, and he didn't want to scratch even his new chain). They decide to bail out and assemble a vehicle in a scrap depot, and the guard opens fire on them. Finally they reach the ship they came from... And that's when the reader finds out it's the same ship that had tried to trap Xadhoom in, and she's still there.
Angus decided to give her a floral homage, and bought her a cactus. Donald has just finished pointing out it's not what you should give a girl on the first date that Xadhoom shows up, mistakes the cactus for a snack and eats it.
Donald: "I-I told you so." *that Xadhoom was not an ordinary girl*
Angus mentions that Morrighan, a colleague of his, is trying to use an old story about alien invaders (having been caught into an Evronian raid, and mailed the footage to himself to prevent the authorities from confiscating it. They replaced it with a cartoon), and boasts that if it was true he wouldn't miss it... Before PK and Xadhoom!
Angus ended up in hospital due the Evrons beating him up when they crashed the party. When he wakes up Morrighan gives him Xadhoom's get well present... A cactus. Then he tells him he won the prize for saving the worst journalist of the year, that is Angus... Who makes him eat the cactus! Differently from Xadhoom, Morrighan got hurt.
From the same issue, Donald is trying to explain Xadhoom how you use a fork, but she gets enraged. Donald leaves while telling he wasn't even sure they had forks on Xerba, and then attempts to guess how Xerbian forks are called. Xadhoom's reaction gives us this pearl.
Uno: "So? Have you found how Xerbian forks are called?"
Donald: "Yes! Darts!"
The end of PKNA #17, Shooting Star. During the whole story, Xadhoom has been acting crazy due the aftereffects of being hit by the biggest energy-absorber ever built by Evron, and Paperinik had to contain her while he tried and cured her condition. At the end Xadhoom decides to thank him with a kiss on the lips... After forgetting her body temperature is the same of a star! Three guesses on what happened to our poor hero.
The Negated Moment of Awesome of battlecruiser Centurian: the old Evronian spaceship enters the frame and utterly curbstomps both the entire military of Stahlburg and the rebels against Evron that were keeping them at bay, Paperinik's attack barely scratches the paintjob... And all of a sudden the defective antimatter alternator breakes down, crippling the ship and exposing to the universe her true nature as The Alleged Ship. Doubles as Brick Joke, as the introduction of the battlecruiser showed that the antimatter alternator had a tendency to make an annoying noise (that started again just before the alternator broke down in battle) until a technician punched it (he tried it again after it broke down mid-battle, but failed).
Kurg: "They're attacking with smoke?!"
Yak: "You never know what to expect from the Evronians..."
From the same issue, the page pointing out that Evronians and Ergonians (a very similar-looking species from a world in the same system as Evron) only look similar and suggests to never trust appearances showed two examples of why you shouldn't trust appearances: the inhabitants of Lycon XI looks like nice puppies but have the nasty habit of shooting down every visitor for the hell of it, while the Orgonians look like monsters and are some of the best romantic poets and singers in the whole universe.
Still in the same issue,Krug is given a bazooka to fight an army of mechas attacking them. He can only thinks of using it to impale an opponent.
Yak:"By the way,can i suggest you to use the trigger next time?"
Angus:(from the TV) But... What the... DIRECTIOOON!
Every time Baldo shows up. One of the short stories even had Angus becoming the inspiration for the original creator of the character, and another had Angus trying to expose some cops as members of his fan club (including parties with fuzzy animal costumes), only for said cops forcing him to take part to one such party and getting pictures.
And in the Universo Pk miniseries Paperinik is facing an horde of Evronians, tries pressing some button at random on the commands of his car... And the radio starts playing the theme song of Baldo's cartoon, annoying our hero and confusing the Evronians, who try, and fail, to make sense about it.
Half of the antics between Trip and his father, the Raider. The cake comes at the end of PKNA #34, when they are reunited, we have a bedtime chat... and then Trip says he wants to be like PK when he grows up. Loud argument, Death Glare between the two, and a punishment ensues.
Raider: "I will never be a superhero. Write that a hundred times before going to sleep.
Raider:(re-enters the room) Almost forgot. Vowels in red, consonants in blue.
Issue #13 The Longest Christmas had Morrighan caught in an Evronian raid, and mailing the footage to himself before the US Army confiscated it. When the footage arrives he decides to show it to his fellow journalists... And that's when he discovers the US Army intercepted the footage and replaced it with a child cartoon about the love life of a daphnia. Even Lyla couldn't resist the temptation to mock him for it...
Becomes a Brick Joke in issue #28, when Angus says that Morrighan is trying to use that old story to win the local counterpart of the Pulitzer and promptly dismisses it before Paperinik and Xadhoom. By the way, Morrighan won the prize when Evronian super soldiers raided the place, confirming his story in the process.
PK: Oscillations! Time travels! Parallel dimensions! How can you stand this?
Raider:(takes a small container full of pills) Cachet.
The way Newton and Vostok bicker to each other is hilarious.
When the leaders of the Organization give Newton the task to contact Paperinik, this exchange occurs.
Vostok:"Even the last of the idiots would be a better choice of him!"
The three look at each other, grinning evily.
Gulligan Cut to Newton and Vostok apparing in the XX century.
Issue 20 "Mekkano". The titular robot assimilating Gorthan? Not funny. Gorthan ordering a few Evronian soldiers to be taken out of Mekkano, while said soldiers are giving their higher-ups a report of their mission and are completely ignoring Gorthan's angry ranting? Funny.
In issue 43 "Time to Time" Paperinik and Lyla must work together with some of the best droids IN the history of the Time Police. Lyla's reaction is funny enough, but the best part is when another droid joinS them...
Odin Eidolon:: "Lieutant Cobrain of the Special Corps will travel with you!"