Um... When Sesshomaru was full demon? Or Inuyasha full demon?
Well anyway, I'll say both.
When Sesshomaru is full demon while fighting Inuyasha it is episode 007. They are there fathers grave fighting over tessaiga.
When Inuyasha is full demon fighting Sesshomaru it is episode 52- A demon's True nature.
78; Only You, Sango
its the first Inuasha movie affections touching across time
I think it's inuyasha final act episode 3
Episode 7 called showdown Inuyasha vs. sesshowmaru
InuYasha: The Final Act: Episode: 26: Towards Tomorrow
78; Only You, Sango
its the first Inuasha movie affections touching across time
Sango premiere's in Episode 24 of Inuyasha: "Enter Sango The Demon Slayer"
I think it's inuyasha final act episode 3
The one where Inuyasha fought the demon bats and broke the red sphere.
I believe that is after "Yura of the Demon Hair" episode 4 so I'm guessing it's episode 5
Episode 7 called showdown Inuyasha vs. sesshowmaru
InuYasha: The Final Act: Episode: 26: Towards Tomorrow
Sango killed a bear demon in InuYasha episode 78-Only You, Sango
Sesshomaru is Inuyasha's older brother. Unlike Inuyasha tho, Sesshomaru is a full fledged dog demon. While Inuyasha is only half
episode 13 The Mystery of the New Moon and the Black-haired Inuyasha -- This is the episode where Kagome and Shippo see InuYasha in his human form for the first time, along with the spider demon (AKA: Spider-Heads)
I believe it's Inuyasha episode 56, if that is the one you are looking for.