Blue dropping his rose during his henshin, and scrambling to pick it up.
During a mid-leap freeze-frame scene, Blue gets bored and breaks the fourth wall by continuously glancing to his side, then swings his sword around a bit. He then drops his sword, and goes to retrieve it, then swims up the screen. He's out of position when the freeze ends, and ends up getting knocked around by a bunch of other Wonderful Ones.
When Wonder Green is a bit upset that Wonder Red - a rookie with barely a month on the team - is the leader after Green's introduction, he demands to know Red's tactical exams scores. Red reveals that he scored 100 on the written while 98 on the field. The Jaw Drop and unspoken Big "WHAT?!" looks on both Green and Blue respectively is priceless.
The moments where Wonder-Green tries to hit on Wonder-Pink, and then Pink's responses to them.
Perhaps even better if Wonder Cheerleader is a part of the group. This implies Silvia thought it appropriate to call Wonder Pink in the middle of duty while she was several feet away.
SO MANY QTEs have hilarious failure results. Failing to create the arrow for the Goddess of Blossoms' bow has the statue turning to SHRUG AT THE CAMERA before slide whistle falling off-screen. In an earlier QTE, not forming Unite Gun has Wonder Green hit by a building and knocked into sky, complete with a sparkle and A FADE-IN PICTURE OF HIM GIVING A THUMBS-UP. You will laugh at one or more of these. You can watch all of the QTE failures on this channel.
If you fail creating the Unite Whip for the very first time, Wonder-Pink will run towards the camera, punch it, and then stomp on it repeatedly.
Upon being sliced in half (even holding himself together just long enough to say something), Laambo literally calls shenanigans on the Wonderful One-Double-Oh for defeating him.
Later, his brother Walltha says the same thing.
The second boss clings onto the Virgin Victory just after you kick its ass in an attempt to perform a self destruct sequence to take down the ship. How do you get the jerk off? You use Unite Hand to tickle it.
Perhaps even funnier is the QTE fail; all of the ships fly out of the way as Platinum Robo quickly swims to the Earth and moves it out of the way of the shot. The QTE then restarts to let you try again.
And if you pay attention, while everyone is frantically button mashing as much as they can, Wonder Yellow is slowly pushing his own button, only managing 3 presses while on screen.
The Wonderful 101 learn at one point that someone has been leaking information to the GEATHJERK. When Green hears this, he says this:
"When intelligence leaks, it's usually me!"
The look on Pink's face when hearing this is priceless.
There's also the reverse of that, which is THE ENTIRE WONDER-TEAM giving her the exact same look in response to her accusations of Red "running around with some hussy [Immorta] while they are trying to save the world," when she's been fangirling over Vorkken in their every encounter. The later version includes Luka and Immorta also giving her that expression, and it's hilarious.
If you die as Pink during any of the Vorkken boss battles, rather than her usual death shriek, she yells "VORKIIIIIIEEEEE!!!" instead.
This little lyric from the theme song, because of how (intentionally) ridiculous it is: "Go, go team! Demolish those fiends! Toss 'em in a garbage can!"
In Operation 005-C, the Wonderful 100 have caught the Super Reactor statue while piloting a Humongous Mecha. It is grasping onto it while the team try to figure out their next move (read: how to get it moving again). Blue presses a button... which results in the robot flinging the reactor down a huge lava-fall. Cue group shot of Blue, Pink and Green screaming as the reactor plummets... only for it to warp into Subspace RIGHT when it's about to hit the bottom. Green and Pink then chew him out for it.
Pink: Didn't your mother ever tell you to keep your hands to yourself?!
Blue: You guys are harsh...
During the final battle, the final boss gives an Aside Glance to the player.
What is the aside glance done for? The intended finishing strike is called Wonder Ultra Platinum, and is drawn and then becomes the Platinum games logo.
The QTE at the end of Operation 007-B certainly counts. After extracting the parasite from Prince Vorkken and beating it up a bit more, the miniaturization on your team wears off and the parasite has an Oh Crap moment when it realizes the fight literally becomes a Curb-Stomp Battle. Yes, the QTE is for stomping it repeatedly.
The Punch-Out!!-style battle against Wallgah-Goojin in Operation 005-C. The sheer absurdity of two giant robots duking it out like Little Mac and Mr Dream accompanied by music that sounds like it was ripped right out of said game is just hilarious.
No matter where you go, the Wonderful Mart will appear at the end of a level. In space? Inside enemy territory? inside Vorkken? It'll be there like a hilariously invasive Waffle House.