In the final installation of Doors, Doors 3, I found a scene with Gumball in it.

For those of you who don’t know Doors, it’s basically a series of collaboration videos in which (mostly) SFM animators make scenes for Twilgight to travel through, with her entering and exiting though doors on the sides. You’ll understand when you see it.

Anyway, for the scene, skip to 6:20. It’s short, but every scene is.

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wow, so that's the last one? these are some of the videos that got me watching the show, farewell to good times I guess.

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Yup, it's the last. So sad.

But then again, it's also the longest, at over 25 minutes, it's more than 3 times longer.