The boss fights are chocked full of these moments.
In particular, during the climax of the fight against Laambo, The Wonderful 101 form an arrow with Unite Build on the Goddess of Blossoms Statue's bow to fire a finishing shot that pierces Laambo and kills him.
Yellow hammering an alien ship back at the boss who tossed it at him during the climax of the third boss fight, and causing the boss to explode.
The fifth boss is one giant Shout-Out to Punch-Out!! between giant mechas. In the bottom of an active volcano.
Then there are the fights against Vorkken and his crew. He's able to use all of your Unite Morphs in addition to two unique to him, and gains new ones through the story to match your new allies, including the defensive ones such as Guts and Spring. It eventually comes to its climax in operation 006-C, when he activates Teio form, his version of your Unlimited form, complete with reverse transformation pose.
How do you go about killing Gimme? You punch him out of his ship and into one of GEATHJERK's Kill Sat beams, incinerating him.
The conclusion to Operation 009-A: The Platinum Robo turns the massive Shirogane Comet over to become a shoulder-mounted BFG that wipes out everything with a massive laser.
As one might expect from the people who brought you the likes of Viewtiful Joe, Ōkami and Bayonetta, Platinum Games absolutely blow the walls off the house for virtually the entirety of the final battle, which kicks the properties of the game's premise into overdrive and leaves you completely in awe. Let's go into a bit more detail—grab some popcorn, this'll take a while.
Phase One, we kick things off inside the planetary fortress with Jergingha...who is, himself, the fortress. Needless to say, he can do whatever he wants in here, but luckily for you, he only sticks to gigantic tendrils that sprout drills, lasers, chainsaws and other fun little weapons. And the first phase itself has a second phase, wherein you have to survive a rush of the game's most powerful enemy classes, one after another, while Jergingha gives his spiel about his true origins. What are those origins, you may ask? He's from 1500 years ahead, where Earth became the leader of a conquering interplanetary system. Where's his proof? A Wonder Mask.
Phase Two, we're faced with the mismash abomination simply called Wonder-Jergingha. This Wham Bam Rock style boss, bearing his own Wonder Mask, has access to all of your Unite Morphs, which he gladly takes Up to Eleven. For example, his Unite Claw can rip a hole in the fabric of time and space, and it only gets more absurd from there. Your only hope is to bring down the brain by countering with your own Unite Morphs, and even afterwards, we have a lovely Nintendo Hard escape sequence. Oh, but remember how Jergingha kind of mentioned he was the fortress? Guess what hasn't been destroyed yet.
Final Phase, and Jesus, is it a biggun. Jergingha has transformed the entire inner workings of his fortress body into his ultimate state, entitled his Planet-Destruction Form. And before you think it's exaggeration? He's easily the size of Russia, at least. Luckily for you, Platinum Robo stopped by, so you have some semblance of chance. You start by breaking through barriers requiring full-scale Unite Morphs, ending with one up to two hundred members. Then the big guy decides to rain hell via Macross Missile Massacre, which only the power of button mashing and Wonder Punch can stop. And thus, this continent-sized behemoth decides to take you straight on, in what can only be described as Doomsday Zone crossed with Okami and a dash of Pikmin. Oh, but that's still not enough, even when you blow off half his head. Jergingha decides to do what he probably should have done from the beginning, and unleash his body's most powerful weapon—which is the size of his torso—the Chi Q Marble Buster. With this huge beam coming, there's only one thing left to do...Protect Earth
A minor and subtle one, but Wonder Green is snacking as always in Operation 007, even though Operation 007 takes place inside Vorkken's body. The fact that Green still has an appetite even when inside the body of an extraterrestrial being proves that this kid's definitely got guts.