There is no field blending. It uses pulldown on 1 frame every 5 frames to get 29.97fps from film speed animation created at 12fps. You can get 23.976 fps progressive by using inverse telecine (TIVTC), then use sRestore to get the original 12fps video with no duplicate frames. Anyway, that's the way it looks to me. What happened with all the aliasing in the background diagonals near the end of the clip is anyone's guess.
Code:
MPEG2Source("path...........\goons.d2v")
AssumeTFF()
TFM(pp=0).TDecimate(cycle=5,cycleR=1)
sRestore(frate=12)
goons_12.mp4 sample @12fps download (2.3 MB):
https://www.mediafire.com/?v0n2eaadqeei926