post a son vs father battle

Rin Okumura vs Satan

In the picture it's Yukio Okumura (Rin's brother) who is being possessed by their father, Satan.

Laxus vs Ivan (Fairy Tail).

Not sure if this counts, but Tomoya vs. Akio from Clannad

Gaara vs 4th Kazekage/ Gaara's father (Naruto Shippuden)


Gaara's father was the former kazekage........and he was revived by kabuto for the war as his poppet so Gaara has no choice but to fight his father.......and seal him for good....it was an epic battle..he he he he