Moonlight

First added in Pump It Up ZERO, "Moonlight" was the most popular song of its day and a poster child for the version's chart style: high difficulty, dense note counts, and a physical, stamina-first design with a dash of skill. It is also credited as the starting point of the low-speed run; its roughly ten-second slow section is still, more than fifteen years on, one of the hardest passages in the game.

On PHOENIX the song carries Single 4/8/11/18/19 and Double 12/20/21/24, plus a Short Cut. Several designers contributed, including KANG2 (S11, S19, D12, D21), HP (S18), and EXC (D24, added in PHOENIX 2.06.0). The S11 was infamous in the ZERO era and crept upward in level over time. The trill-heavy S18 awards the Drill Lv.4 title when cleared at SS rank or higher in XX. The D21, a ZERO-era Nightmare, hinges on a brutal speed-change (gimmick) section; clearing it at SSS+ grants the NO SKILL NO PUMP title.

The BGA follows a couple adventuring across land, sea, and air until they kiss and head home; at the end the background morphs into the August "bright" card from hwatu, the Korean playing-card deck, a nod echoed by three geese in the late section. The Short Cut runs just 38 seconds, the shortest in the entire series. In January 2021, players spammed its Single 15 over and over to speed up the Brain Power unlock in XX, which vaulted this old track all the way to the top of the popularity chart.