Magic Sword - Arcade - good end
During development, Capcom was going to program the gameplay so the player could have up to two allies (four in total in a two-player game). The hardest part of the game was the placement of enemies in each stage. One of the last features implemented in the game was the secret doors.
The game was being location-tested in Japan by April 1990.
Million of thanks to @GirolamoReadyToPlay for trying A LOT of times to beat this boss with me without using continue..we didn't succeed but this is a very difficult boss battle and also chaotic, since the screen becomes quickly full of "flying things", making difficult to even understand where your charcter is :D
This video is part of the videogame endings database, whose goal is to catalogue and create the world's largest archive of videogame endings! (what an humble and not ambitious project :D