"Ramuda, Gentaro and that baka" (from Hoodstar and Hoodstar+).
Doppo pointing out he's caught another jellyfish in Papillon. Don't give up, Doppo!
Cats Gentaro (from Don't Play No Game I Can't Win). Similarly, when Gentaro "loosens his screws" (also known as the frog scene).
"Heaven the Magic King" from Mixed Up.
Manga
Dice challenging Gentaro to read his name note Dice's name is written with kanji and kanji can be read various ways, so there are many ways to stuff up if you have no prior exposure to a certain set of kanji.
Sasara knocking out the Tobari brothers with a fire extinguisher.
Hifumi and Doppo Search for a Stress Relief Method for Jakurai, the manga chapter adapting the drama track that originally came with Wrap & Rap - Hifumi and Doppo's mental images have to be seen to be believed.
ARB
From Soul Swap, Soul Shift, Bewildering Soul Chaos and Tricky Soul Agitation:
Ichiro drinking water out of a vase.
Ramuda causing chaos in Jakurai and Samatoki's bodies, such as dressing up the latter's underlings in fancy clothing.
"Kuko" (Jakurai) meditating and Jyushi declaring Kuko's "gone all weird".
"Amaguni Moon".
"Jiro" (Rosho) getting all the multiplication questions he was set correct...and that's how Ichiro and Saburo believed Rosho was swapped into Jiro's body.
Gentaro using his body swap with Jyuto to troll Samatoki and Riou.
Ramuda and Dice believing "Gentaro" is doing his best Hifumi impression.
Rei (initially) getting away with his Doppo impression, despite using his usual pronouns.
The scenes with the running sound effects in the 3rd liners' soul swaps.
Sasara's birthday lines. In 2021, one of Rosho's birthday lines indicated he'd given Sasara a joke practice book. In 2022, Rei continues this by giving him a book called something like "Joke Fundamentals Even a Monkey Can Understand".
This interaction between Gentaro and Ramuda during the 1.5th anniversary and 2023 New Year's roulette:
Gentaro: Ramuda, do you know this rumour? If you get a jackpot on this roulette, you can be reincarnated into another world...
Ramuda: Really~?! So, if I get a jackpot, we’ll see if your story is true, huh?
Gentaro christens a calf "Saburo" after noting Ichiro and Jiro are present at the farm, but not the youngest brother. This then leads to Jiro talking about the calf Saburo to Saburo.
The fact a shark has appeared every year since ARB's debut...and 2024's shark is Sasara playing a shark in a B movie.
Stage play
Jakurai dropping his mic.
Jyushi getting kneed by Kuko.
Kuko being captured by Hifumi and Doppo during the BAT vs M stage play...and then Hifumi and Doppo take pity on Kuko while Jakurai is still out cold, resulting in Kuko eating Hifumi's food and wanting more.
Other
There was already "Sougyaran BAM" to prove Hypnosis Mic could do great pseudo-fitness songs, but the trailer of "Move Your Body Til You Die!" is...something else in a Refuge in Audacity sense. What really sells the deal is when the buff 3D model jumps into the clouds when the lyrics go "jump with all your might".
Kimura makes really grumpy faces while doing the routine in the Homies version of Live Anima.
Sasara starts doing a silly radio calisthenics-type routine during his time hosting Hyped Up 02 and the other characters which are hosting at the same time follow suit. This leads to Jyuto going "Hyo!" during his version of it and Doppo eventually screaming during his.
The Tchaikovsky joke from Rhyme Anima+ episode 4note basically, Sasara warns the ladies that Tchaikovsky is not an invitation to drink because he loves them (saa, ikou! suki! means "So, let's go! I love you!"). Most of the other jokes in that episode are wordplay which is lost in translation, but that one is easy enough to understand from just listening to the Japanese audio.