David Cage. Whenever given a chance Tom will mock him with the "Cage Voice" and the Twitch chat will openly take the piss out of him.
DarkSydePhil and Game Grumps (especially Arin). Tom and co. regularly criticize and mock the two on Twitter, and occasionally slip the odd one or two Take That! in commentaries. A podcast was even made on how much DSP's attitude reflects badly on the gaming community and those with a YouTube career.
The students of East High School are secretly ninjas, while Coach Bolton and Sharpay are nigh-demonic.
Parasite Cage is a great old one.
Done with an entire movie. Pokémon: Jirachi: Wishmaker is about a butler who is trying to blow up the sun with a cute little fairy thing while May is secretly plotting to destroy the world with her wishing star. Also, Mai Valentine drives the Magic School Bus.
SOS: The Final Escape (Disaster Report in the US) is about escaping a collapsing city (While Open Your Heart plays in the background) and trying to get Super Smash Bros. 4 from Sakurai.
DiZ is sometimes portrayed as being obsessed with playing World of Warcraft which is one of the main reasons they think it took so long to restore Sora.
A Running Gag during the Sonic-a-thon is people who donate leaving in their message, styled as a short breaking new article, a story about what's currently happening in the game the runners are playing, usually portraying Eggman as trying to do something benevolent and Sonic and Co. ruining it.
Tails is some local fox who ruins everything, from charity marathons to random islands to history itself, just to fuel his mint candy addiction.
Heavy and Bomb are political heroes known as "the people's champions", expressing their opinions on whatever news subject happens.
Cream is a rabbi who specializes in "Chao-tossing".
Broken Base: With two mass breakups in 2013 and 2014, the fandom is split over whether HFC has suffered as a whole and that the many people who left were what made the channel interesting, that the smaller group simply led to a change in direction, or that HFC now is much more focused and organized than it was before and is overall better off.
NTom defeating the final boss of Luigi's Mansion with only 5% of his health left.
NTom, greatzombieron, and IRTundraboy reading out this very page during the Half-Life 2 playthrough. At least to us...
During the Sonic Unleashed playthrough, Tom and Fastest Thing Alive would often compare the PS360 version of the game with the WiiS2 version to see which was superior, with Tom on the 360-side, and FTA on the Wii-side. At the end, what version does Gareth ultimately think is the definitive version?
In one part of the Kingdom Hearts playthrough, THD learns about the word "quiff" from Tom and mentions that he should use it more often. Cue the commentary for Raikou: Legend of Thunder, where he uses it in almost every sentence.
In the Pikachu and Pichu commentary, Tom and THD hope for a fourth Spider-Man movie featuring Lizard. This was a couple years before The Amazing Spider-Man came out with the Lizard being the antagonist.
In one part of the Sonic 06 playthrough, FTA quipped that it'd take Tom three years to get to the 1000 Heartless Battle. That was in May of 2008 — over two years before Tom eventually reached said battle.
Later on in the same playthrough, FTA mentioned that he'd love a Sonic the Hedgehog 4. Almost two years afterward, guess what?
In their Birth By Sleep playthrough, they make several parallels between several cutscenes and scenes from Star Wars. Cue Disney buying the rights to the movies.
In their Destiny Deoxys commentary, one of them asks if they will, one day, make "Picnic Ant" Pokemon. This was before Black and White came out anywhere. Now, I'm not seeing them getting any picnic baskets, but do we really want to see Durants crashing any picnics
At the start of the Pokémon X commentary, Shauna was the Scrappy of choice as NTom and THD would criticize her whenever she got screentime. Later on, they gradually warm up to her and start redirecting their ire towards Serena instead for her failures.
Richy is not fond of Helen from NiGHTS: Journey of Dreams due to her coming off as quite selfish and having the more tedious missions in the game.