SpongeBob’s Bundle Bonus Content
(from Pre-Ordering the Pack)

Those are custom versions of the bonus content that players could get for pre-ordering The Sims 4 Spongebob Kits Bundle back in 2025.

Since there's no way to unlock the items, like with the rewards from live events, I've set it up so that if you put down a lot that contains an original item which you're missing, the game replaces it with my own custom ones as a fallback object.