How many episodes of season 12 did Hillenburg work on?

[Fear Of A Nerdy Patty]

11 is the last full season he was involved with, but he also had time to work on season 12 a little before he died. But for how long was it? And are the episodes he didn't work on noticably different in tone and feel?

 

[Original Raw and Uncut]

Birthday Blowout was the last episode he was involved in

 

[Sara SquarePants]

I believe the very very very last projects Stephen Hillenburg was involved in were Sponge on the Run and Kamp Koral

The Patrick Star Show marks the first REAL SpongeBob SquarePants project made without Hillenburg!

 

[Fear Of A Nerdy Patty]

There are those claiming he knew about Kamp Koral, but doesn't say on his imdb profile he actually worked on it.

 

[Sara SquarePants]

But when I watched it last night, it very clearly said:

"Created by Stephen Hillenburg"

Maybe Nick and Paramount put that in to throw people off though...

I wouldn't put it past them to do a dirty trick like that!

 

[Squidward1999]

I could agree with his final project being Spongebob's Birthday Blowout but I'm a bit spectacal about the other two though...

 

[Fear Of A Nerdy Patty]

He's listed as an executive producer on Sponge On The Run.

 

[MPack]

I have heard that "Pineapple RV" was the last episode produced before Steve died. That is according to one of Vincent Waller's tweets.