Timemon effortlessly defeats DoGatchmon by stopping time. During so he punched DoGatchmon 3 times and enjoyed his afternoon tea 5 times with the last tea cup being stale because he overused the tea bag.
The Mon of the week plasters Eri's face onto various things, even going as far to being posted on soccer players.
After getting the last seven codes Appmon, Dennemon starts coughing from his last announcement.
Dantemon's providing his own theme music, made better by the Appli Drivers' confused reaction to it.
Unlike almost every other villainous Bishounen characters in anime, Knight actually seems to somewhat appreciate (or at very least doesn't mind) the attention he gets from the women, rather than faking it JUST for the sake of PR.
When going to the Deep Web again, Hackmon and Rei greet the stone Dantemon and give him a rather large pack of Rei's favorite energy gel and some shoulder pads for his 'stiff muscles'
Gatchmon offers Hackmon some of his Gatchi Sweets. But due to Rei rushing to leave, he assumes that Hackmon won't take it and pulls back the sweets and eats them himself in seconds. Cue to a visibly annoyed Hackmon.
The flashback of the death of Shinkai Den'emon in episode 38 is somewhere deep in the margins where the difference between Black Comedy and Gallows Humour becomes blurred.
How Haru landed on the signboard. Eri and Astra's impressed clapping really nailed it.
When Biomon resurrects the Terrible Trio of season 1 (Scopemon, Mienumon and Sakushmion) in episode 39, he accidentally ends up resurrecting Sukasimon too. He is so out of place that it immediately gets lampshaded by the other three and ends up confusing even Biomon himself.
It's even more hilarious that Hackmon informs Rei about it with utmost seriousness and Rei bluntly questions him how he even knows of the dance in the first place.
Damedamon's powers did not revert affect Ultimates from 3D to 2D like Coachmon's Art Shift—they were reduced to scribbles.
Shutmon reverting back to Offmon's personality.
There's a temple called Alcatra, which name is intentionally to draw comparisons to the American prison of similar name.
Eri explains & taunts Deusmon about Poseidomon's ability when he uses it to defend against Deusmon's attack. And she somehow managed to climb a gigantic pillar to reach there and proudly proclaim it meters above Rei and Astra in a short amount of time. She's also loud enough to the point they can still hear her. Rei's reaction sums it all: