Vs. Meta Knight
This theme is composed in 5/8 time signature with a haunting tune played primarily on strings. Orchestra hits punctuate each "verse" while a driving synthetic bassline grounds the rhythm. Near the end of the loop, a jazzy synth solo leads to the music's peak in intensity before returning to the start.
Kirby Super Star (Ultra)
Kirby's (Extra) Epic Yarn
Meta Knight is fought in Space Land under the control of Yin-Yarn. The "Vs. Meta Knight" theme is rearranged in a more tense style using piano, electric bass, and light percussion, in a similar style to other tracks in the game. Xylophone and marimba are used for additional texture.
Kirby: Planet Robobot
When he is fought as Mecha Knight+ in Access Ark, "Vs. Meta Knight" plays, now remixed by the original composer Jun Ishikawa and titled "Inner Struggle" (己が精神との闘い Battle with the Inner Spirit in Japanese). It has a similar style to the original with an electronic tinge.
In addition to the original haunting tune, this version features electric guitar solo of the theme's final section.
This version can be found as Track 84 in Planet Robobot's Jukebox.
Kirby Star Allies
In Kirby Star Allies, normally a remix of "My Friend and the Sunset" (ending theme of Revenge of Meta Knight) plays in Meta Knight's boss battle and the first phase of the Parallel Meta Knight battle.
However, on the Soul Melter and Soul Melter EX difficulties of The Ultimate Choice, "Inner Struggle" from Planet Robobot replaces Meta Knight's boss battle theme and Parallel Meta Knight's first phase music. The Planet Robobot remix can be found as Track 204 in the Jukebox as of Version 4.0.0.
Interestingly, both of Meta Knight's boss battles in Planet Robobot and Star Allies are against his will, thus referring to his inner struggle.
Kirby Fighters 2
In Kirby Fighters 2, "Vs. Meta Knight" is included as part of the medley that plays during the fight against Waning Crescent Masked Dedede & Waxing Crescent Masked Meta Knight.
The theme is featured in the first half of the bonus track ボスバトルメドレー／エレクトロニックver. (Boss Battle Medley / Electronic Ver.) from the Kirby Ultra Super Deluxe Original Sound Track.
- "Vs. Meta Knight" is similar to the Vs. Ridley/Escape theme from Super Metroid. They have the same 5/8 time signature and identical riffs.
- "My Friend and the Sunset": Rearranged as Meta Knight's boss battle theme in Kirby Star Allies.