In Tekken 5, I found a hidden stage, which seems to be Jinpachi's cutscene stage. In the stage, this appears after you land a hit once on the opponent. : r/Tekken
12 Most Hated Fighting Game Characters – Page 11
Tekken 5 - Wikipedia
Tekken 5 (Game) - Giant Bomb
Final Stage | Tekken Wiki | Fandom
Playable Jinpachi Mishima in Tekken 5 by deviantarter1236 on DeviantArt