Named in honor of the artists that picked these fun sources! I covered both sources in a medley. I structured it to treat each song separately (mostly) to be sure that I kept things faithful for both songs to stick to the spirit of the MnP.
For Inner Darkside, I employed samples of authentic japanese instruments to take the lead and used some synthetic bass and pads to add atmosphere. And Taiko drums! I went for capturing the original's atmosphere, a kind of mystical awe of a strange, slightly sinister place. I primarily stuck to the original, but revisited the melody for some variation. The dark parts of the song connected well with the BFH03 Builder bassline.
Speaking of, I tackled the BFH03 Builder with my best attempt to replicate the gritty electronic vibe of the original. I used several FM instruments, and threw down some sfx's I found in my library. I used part of the original drumline, the almost militaristic snare beat. I distorted a piano vst for the thrumming chords of the middle, which made an interesting effect. After a runthrough, I adapted a few parts of Inner Darkside to call back to Shinobi. Right before the end, I got a bit carried away and created something almost dancey by changing the bass progression, and I hope it's not too outta line for MnP cause it was real fun to make.
This was great fun to create, a real eclectic experiment.