Regarding Trombe Override... The theme was named Trombe in Super Robot Wars/Taisen Original Generation, it belonged to Elzam who appeared as an enemy boss unit through most of the game and they made boss themes play over your units themes. However when he switches over his theme was still flagged as if he was a boss, so it played over other bosses, even the final bosses, musical themes which caused a joke that the devs turned into a game mechanic in the characters future appearances.
Regarding Trombe Override... The theme was named Trombe in Super Robot Wars/Taisen Original Generation, it belonged to Elzam who appeared as an enemy boss unit through most of the game and they made boss themes play over your units themes. However when he switches over his theme was still flagged as if he was a boss, so it played over other bosses, even the final bosses, musical themes which caused a joke that the devs turned into a game mechanic in the characters future appearances.