As visible here, this episode has multiple alternate titles. Do you have an official proof that the original Nickelodeon broadcast took place with the title "SpongeBob SquarePants and The Big Wave" ?

Well, I don't have a proof of the original broadcast title but in my content (the official DVD collectors box) the title is actually: "SpongeBob SquarePants and The Big Wave". Here a screenshot of the opening sequens: https://share-your-photo.com/b64965c816 Not sure how to measure it. Are there alternative titles placeable for single episodes within TMDB?

@FM-i_!Zw said:

Well, I don't have a proof of the original broadcast title but in my content (the official DVD collectors box) the title is actually: "SpongeBob SquarePants and The Big Wave". Here a screenshot of the opening sequens: https://share-your-photo.com/b64965c816

So, we can't change it based on this.

Not sure how to measure it. Are there alternative titles placeable for single episodes within TMDB?

No.