It's rather sweet that a bunch of convicts would take in and raise a baby. While Megamind's criminal parents might not have been as pleasant as Metro Man's rich parents, it's notable that both aliens came to this world and almost immediately found a family.
A hidden Metro Man's So Proud of You to Mega Mind, though the latter never hears it.
Megamind visiting Metro Man's shrine after his "death" and reminiscing about their relationship. He even brings yellow roses, which symbolize friendship. Awwww.
Minion, posing as the Warden accepting Megamind's apology.
When Roxanne hugs Megamind disguised as Bernard. His reaction strongly suggests that he'd never been hugged before.
Megamind: You want to hear it? Here it is; from the blackest part of my heart: I! Am! Sorry!
"You know...you look really good in white."
Final scene: Roxanne jumps into Megamind's arms and kisses him on the cheek. Megamind's expression is that of pure joy!
That whole finale altogether, that Megamind is finally admired by the people of Metro City for his heroism.
Mayor: Ladies and gentlemen, Megamind, defender of Metro City!
Megamind: (voiceover) You know...I like the sound of that.
When Megamind and Minion are breaking out of prison one last time to go confront Titan, they pass the warden, who had been left tied to a chair by Minion, and he calls to them "Good luck, fellas!" It's such a sweet moment, because, let's face it, the warden was the closest thing Megamind ever had to a father.
Megamind reappears and reminds Titan the difference between a villain and a supervillain, during which Titan is temporarily sidelined. Megamind rescues Roxy, and her first words to him are I knew you'd come back!. And she did, even if he didn't.
Button of Doom short
Megamind has a recording of Metro Man's song in his lair.
Megamind and Minion are in happy tears when they discover that Metro City gave them their own signal.