- The correct title of this article is #9 party. The substitution of the # symbol with the "fullwidth" ＃ symbol is due to technical restrictions.
Throughout the song, there is a repetitive beat structure. In the beginning, two of the four (three but the first part of the first sound effect is repeated) main 'sound effects' are heard before they are repeated with the other two playing to a beat and tune. This is repeated before we get a slightly different tune with the 'sound effects'. This is repeated with a slightly different ending before we hear a new section with three vocals and a bit of instrumental before the song repeats. A constant guitar riff is heard throughout most of the piece. It is generally heard in stations where the goal is to either defeat all the enemies, or to dodge numerous enemy attacks. The exception is the more traverse-focused Hypercolor Station.
- This song only plays in Deepsea Metro stations where the lines do not overlap.
This song plays in levels where Agent 8 must defeat or dodge enemies. Party refers to the gathering of Agent 8 and the large amounts of Sanitized Octarians, just like the Rendezvous in Octoling Rendezvous.