History Recap / TheAmazingWorldOfGumballS4E20And21TheOrigins

** We find out where Darwin got his shoes. Gumball gives him his own.

** Richard tries to paint a black fish orange to keep Gumball from finding out that he has a replacement fish. When most cartoons would have the fish painted without any consequences, it immediately dies.

* FromTheMouthsOfBabes: When Nicole try to explain to Gumball that Darwin they recently brought to him wasn't the first fish and what happened to the other fish by claiming they went asleep and swam down the slide instead of them actually dead, Gumball at 4 years old not only knows what actually happened to the other fish but doesn't take it in stride.

** Richard tries to paint a black fish orange to keep Gumball from finding out that he has a replacement fish -- and ends up killing it once again (when most cartoons would have the fish painted without any consequences).

** Richard tries to condole Gumball over Darwin's absence, and Nicole cuts him off because he thought he was going to say "[[InnocentlyInsensitive There's plenty more fish in the sea]]". When Richard explains he was going to say something else ("There's plenty more love in a heart for a new friend."), Nicole says it herself just to correct him.

** Gumball and Darwin end up killing one of the goldfish each. Nicole ends up killing ''two'' of them.

* HowIsThatEvenPossible: Gumball somehow gets sand and snow into the house (it's not winter and they don't live near a beach), and also leaves footprints on the ceiling. Nicole questions how he did it, but decides to not press the issue after seeing the footprints.

* HowIsThatEvenPossible:
-->'''Nicole:''' Gumball, how did you manage to bring both sand ''and'' snow in the the house?\\
''(Nicole follows the trail of shoeprints across the floor, up the wall, and into a crack in the ceiling)''\\
'''Nicole''': I'm not even going to ''ask'' about that.

* YourSizeMayVary: We are explicitly shown Darwin growing lungs and legs, but his growth to human size seems to happen inexplicably between growing legs and making it to Elmore.

* YourSizeMayVary: We are explicitly shown Darwin growing lungs and legs, but his growth to human size seems to happen inexplicably between growing legs and making it to Elmore. It could be [[HandWave hand-waved]] as a result of Gumball and Darwin's soul bond or an animation error.

* MultiPartEpisode: Consists of two quarter-hour episodes. This is the first one for the series, as the staff held off in earlier seasons out of fear that the episodes would air out of order (even though whenever this episode reruns, it reruns as a full half-hour episode).

* RealityEnsues: Richard tries to paint a black fish orange to keep Gumball from finding out that he has a replacement fish -- and ends up killing it once again (when most cartoons would have the fish painted without any consequences).

* MultiPartEpisode: Consists of two quarter-hour episodes. This is the first one for the series, as the staff held off in earlier seasons out of fear that the episodes would air out of order.

** Darwin's trip back to Elmore, which actually shows him the worse for wear from the elements and easy prey for an eagle.

* SomethingCompletelyDifferent: The show's first two-part episode and a WholeEpisodeFlashback showing what Gumball was like when he was four, what Nicole and Richard were like when they first became parents, and how Darwin became Gumball's brother.

* YourSizeMayVary: We are explicitly shown Darwin growing lungs and legs, but his growth to human size seems to happen inexplicably between growing legs and making it to Elmore. It could be [[HandWave hand-waved]] as a result of Gumball and Darwin's soul bond.

** In this episode, Richard says he's going to invent The Internet, but in "The Treasure", the Internet was already invented.

* {{Determinator}}: Darwin stops at nothing to get back to Gumball and Gumball has faith that Darwin will come back.

** Teri's face is drawn like a child's scribbles.

* NoCartoonFish: While Darwin looked just as stylized before growing legs as after, the earlier Darwins were nearly photorealistic and unexpressive, though a few were apparently intelligent enough to run away from the Wattersons. The fish Darwin meets at the ocean are somewhere in between, being realistically-shaped but simple while having a largely human range of expressions.

* YourSizeMayVary: We are explicitly shown Darwin growing lungs and legs, but his growth to human size seems to happen inexplicably between growing legs and making it to Elmore.

* SeriesContinuityError: In this episode, there were at least six goldfish before Darwin was chosen as Gumball's pet and all of them were flushed down the toilet. In "The Party" Darwin's full name ("Darwin Radlin Caspian Ahab Poseidon Nicodemus Watterson III") implied he was the third goldfish and in "The Game" Nicole finds the skeleton of the first Darwin under Gumball's bed.
** Also, in "The Bet" Gumball states that it took Darwin five years to learn facial expressions, but he has no problem with them here.

* NoCartoonFish: While Darwin looked just as stylized before growing legs as after, the earlier Darwins were nearly photorealistic and unexpressive. The fish Darwin meets at the ocean are somewhere in between, being realistically-shaped but simple while having a largely human range of expressions.

* NoCartoonFish: While Darwin looked just as stylized before growing legs as after, the earlier Darwins were nearly photorealistic. The fish Darwin meets at the ocean are somewhere in between, being realistically-shaped but simple while having a largely human range of expressions.

* WholeEpisodeFlashback: The entire episode takes place about eight years ago, with no present-day framing device.

** We see Nicole get the idea to get her job at the Rainbow Factory (which, in this episode, is under construction).
** We also find out where Darwin got his shoes. Gumball gives him his own.

* MusicalisInterruptus: Darwin's song is interrupted when an eagle suddenly snatches him up. When she tries to feed him to her chick, Darwin slaps the chick in the face and continues walking on while singing.

* ReplacementGoldfish: Darwin was originally meant to be this, but quickly becomes a treasured member of the family instead.