Chris's motivation through the episode is to procure a special type of cereal for Beth, in celebration of the first time Beth ever jinxed him until he got her that cereal. Danny mocks this, believing Beth would never even remember such an obscure moment. The end of the episode reveals she does remember, and is touched by Chris's gift.
Chris and Wallow's presents from their parents.
Beth going off to spend the night with her horse at the end of the episode and her Paralyized Horse talking about how much he cares about her in his closing monologue.
Speaking of which, the shot of Wallow cuddled up with all his various pets.
The Paralyzed Horse throughout "Aeon Worm." The moment he realizes he and Beth are in the See-Through Zone, his first instinct is to get Beth out of there for fear he cannot protect her. Of course, by the end of the episode, he's protecting her far more than he ever could otherwise.
At the end of the episode, Plum gives Danny all the credit for defeating the Galorian Tear-Sucker.
The reason Danny was going through that pound in the first place: Rescuing the Jelly-Kid.
Beth hugging Chris after returning from the alternate universe where he died.