The majority of the sounds produced on synths and other devices on Panchiko's music was often created by Andy or Owain, usually on the Korg MS2000, but a handful of them have been found, here's what is known!
Stabilisers For Big Boys:
Hi-Hats were sampled into the Akai S2000 from the Yamaha DJX's preset "152 AnlgKit3"
(Will upload a sample directly from my Yamaha DJX into my Akai S3000XL at some point here!)

Bitcrushed guitar most likely came from the Akai S2000 and/or the Roland VS-840 on the LO-FI BOX preset, with the guitar driven somehow.
D>E>A>T>H>M>E>T>A>L:
Recently came across the Vibraphone sample from the song on my Yamaha DJX while looking through patches, it's preset 167 "Vibes".
(SAMPLE COMING SOON)

Laputa:
Laputa uses the RetroTurntable preset on the
LO-FI BOX effect in the VS-840 for a few instruments near the end, unfortunately i'm still not certain what the piano preset is from the start of the song, Owain has said before it's a "rubbish general midi keyboard with a load of effects slapped on" which makes me think it could be on the DJX somewhere.
Neilssong:
Oddly considering the name of the website, this is actually the song i have the most info on, the organ preset from the song is "DrawOrgn" Number 172 on the Yamaha DJX ran through the LO-FI box effect under the "RetroTurntable" preset on the Roland VS-840