He only made a brief appearance and he had no speaking lines, except for being heard sadly crooning as he left the scene. He was seen looking very sad at the party for some reason and Rick tried to get Morty to talk to him, possibly to cheer him up, but Morty stopped him because the last time he did that, it was with Gearhead which turned out to be a disaster. So, when Morty ignored him, he started a conversation with Rick, and so Scropon just walked away, sadly and on the verge of tears. According to Rick, his entire planet was destroyed. He is not seen again for the rest of the episode, which implies that he either spent the rest of the party mourning over his planet or left the party early while in depression.