This is actualy Spark Mansion with their boss - Master Spark
So, it's he actually:
Spoiler: show
A tried to press out of spark theme as much as I can.
Since SMB2 has not much soundtracks, I usen remixes. Mix for the boss is mine, I used starman theme for it (I clearly know, SMB2 has this theme), but made this more rampant.
Also this level has event loop which gets broken after boss is defeated and which would seems impossible without lunadll & lunalua. So what have I done? I just not looped last event to first one, but used invisible NPC generator, which activates first loop event. After boss defeat, NPC generator moves onto the wall, which blocks appearance of new NPCs. So you'll not even hear Masterspark sounds of boss! That's how it works.
Video playthrough:
Spoiler: show
Credits:
Spoiler: show









