I Want U

MAX contributed the song as a new Original-channel track in Pump It Up XX, at 156 BPM. Its BGA is a nod to series history: it features logos of earlier Pump It Up versions and, near the back half, a brief cameo from Witch Doctor. The charts are credited to SUNNY, with an extra Double Performance (DP5) by FELIXOR that was removed when DP charts were cut in PHOENIX. The Short Cut was added in the 2.03 update.

In XX, nearly every chart (apart from the S7 and the Double Performance) was infamous as a boss-level chart for its tier, and PHOENIX bumped most of them up a level. The arcade version offers Single S3, S7, S12, S17, and S20, plus Double D6, D14, D18, and D22. The S20 (formerly S19) is the standout: an almost relentless barrage of dense runs laced with brutal twists, regarded as one of the hardest charts of early XX. The D18 (formerly D17) and D22 demand huge stamina, with constant run and hip twists right to the finish. Moving to PHOENIX, several long-note tick counts were slashed (from 64 down to 2), which made the endings and gauge management even tougher.

The Short Cut drops any build-up and goes full throttle from start to finish. In Single it carries S4, S7, S11, and S19, all built on firm twists that reward good reading and stamina control. In Double it is made up of Half-Double (D13 and D21), a relentless run chart with no breathing room from end to end.