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First Appearance

Rex is a possum first mentioned in Legendaddy. Marshall presents him to his friends, to see how far he could go, without anyone saying anything, after he found out, that his friends treat him "with kid gloves" since his father died .



Lily, Robin, Ted and Marshall arguing about Rex.

Rex  is a male opossum  colloquially called possum, which Marshall claims to have found in the trash and decided, that he lives with him and Lily from that day on. In reality he just wanted to test his friends how far they would let him go, after his father died, without being honest to him. Lily responds that she'd love Rex, which makes Marshall mad at her and his friends.


How I Met Your Mother Marshall Possum Rex00:20

How I Met Your Mother Marshall Possum Rex

Marshall describes Rex as violent and claims that he hates him and Lily. Marshall also implies that Rex attacked him at night.


Marshall: Hey guys! This is Rex. He's a possum. I found him in the trash. He lives with us now.
Lily: I love him!
Rex: *grunts*

Marshall: Lily! We are living with a possum. Rex is violent and he hates us!

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