The Reason Woody wasn't in BFDIA was because during BFDI 25, After the UFO crash, tennis ball said "Woody Died" as soon as he exited the crash site. Even the UFO was above land the entire time what if during the flight off camera, Woody was dumped, ejected or thrown out of the UFO. Now listen... Getting thrown out of a plane would send you flying backwards like 300,000ft. So Woody would've been flown/thrown like 30,000ft into the Goiky canal. He probably hit the water so hard it knocked him out, so he drifted off into the sea, and has been there the whole BFDIA series. The reason he returned in BFB (and IDFB but I won't count that since he literally just made an appearance in the intro, I think) is because he managed to climb onto one of the broken boat pieces from BFDI 1a/b and paddle/swim/drift himself back to land. And the reason he only mumble like "nermemromeooo..." in each episode is because he got PTSD from being thrown out of the UFO, and sailing the Goiky Canal for like 4 years straight.

That's my Theory, Thanks for reading.

~SirFunnyPerson