The whole chase scene in general. Props go to the end of the chase where Hater rises up behind Wander with bloodshot eyes and looking ready to strangle him.
After chasing Wander, Lord Hater realizes that he has given Emperor Awesome the top spot on the temple and he is about to be given his wish. So what does he do? He runs toward the temple, bowls through Emperor Awesome's army, throws his giant dinosaur into space and punches him with enough force for him to go through the entire planet. And yet he STILL can't do anything about Wander.
The Celestial Being makes an epic entrance, and then says...
Celestial Being: Hey there. So, uh...I'll be the one granting your wish today, 'kay?
His entire attitude in general.
Lord Hater: Soon, every planet in the universe will be mine! Even pathetic little specs like Banglebrop, all under the control of... LORD HATER!!! *cue lightning*
Wander and Sylvia's song rewinding as they walk backwards to help a starving creature.
The ENTIRE courtroom scene.
Wander's numerous good deeds eventually cause a sun to slightly shift. This causes a nearby fortune teller to inform her client that he will not be a strong and powerful leader, and instead is immature, awkward, and emotionally unstable. Guess who she's talking to?
Lord Hater's wants Peepers to bring Wander to his torture chamber.
Lord Hater: Now I'm going to my torture room and I want you to bring Wander immediately. Or else. RRRAAAAGGHHH!!! Got it pal?! Psyche, we're not pals, Hater Out!...Seriously, this is not going to be easy he's a crafty one, Hater Out!
And then he teleports out, and back in one more time just to do the 'I've got my eye on you' gesture.