SpongeBob SquarePants: Season 12 AMZN New Episodes Added: 14. Shell Games/Senior Discount 15. Jolly Lodgers/Biddy Sitting 16. Swamp Mates/One Trick Sponge 17. Boss for a Day/The Goofy Newbie 18. The Krusty Slammer/Pineapple RV 19. The Ghost of Plankton/My Two Krabses