JoJo's Bizarre Adventure: All Star Battle R/Stardust Crusaders

Iggy vs. Pet Shop

 * Difficulty: ★★☆☆☆
 * Special Rules
 * Pet Shop's Flight Gauge does not decrease.
 * Player's HH Gauge continuously refills.
 * Player's defense increased.
 * Secret Missions
 * 1) Land the "A nasty habit" skill (normal  )
 * 2) Land a GHA
 * 1) Land a GHA

Jean Pierre Polnareff vs. Iggy

 * Difficulty: ★☆☆☆☆
 * Special Rules
 * Player's defense increased.
 * Secret Missions
 * 1) Land the First Attack
 * 2) Down your opponent

Jotaro Kujo vs. Mohammed Avdol

 * Difficulty: ★☆☆☆☆
 * Special Rules
 * Player's HH Gauge continuously refills.
 * Secret Missions

Extra Battles
These are listed as they appear from left to right.

Mohammed Avdol vs. Ghiaccio

 * Difficulty: ★★★☆☆
 * Special Rules
 * Player's Fire damage decreased.
 * Opponent's defense increased.
 * Secret Missions
 * 1) Land the "Red Bind!" throw (close )
 * 1) Land the "Red Bind!" throw (close )

Jotaro Kujo vs. Robert E.O. Speedwagon

 * Difficulty: ★★★☆☆
 * Special Rules
 * Player's attack decreased.
 * Secret Missions
 * 1) Land a 5 hit combo
 * 2) Land the "This incredible power...!" throw (close )
 * 3) Win with the "My Stand will be the judge!" skill

Pet Shop vs. Shigekiyo Yangu

 * Difficulty: ★★★☆☆
 * Special Rules
 * None.
 * Secret Missions
 * 1) Use the "Flight Mode" style
 * 2) Use a GHA
 * 3) Land the "Caw caw!" skill

DIO vs. Jonathan Joestar

 * Difficulty: ★★★★☆
 * Special Rules
 * Opponent's defense increased.
 * Opponent's Hamon damage increased.
 * Secret Missions
 * 1) Use the "Oh, this suits me well!" skill
 * 2) Win with a GHA
 * 1) Win with a GHA
 * 1) Win with a GHA

Boss Battles
(Requires 2 battles cleared on same page to unlock)

Jotaro Kujo vs. DIO

 * Difficulty: ★★★★☆
 * Special Rules
 * Opponent's HH Gauge continuously refills.
 * Opponent's health continuously refills.
 * Secret Missions
 * 1) Land the First Attack
 * 2) Attack the opponent's Stand
 * 3) Land a GHA
 * 4) Win in Rush Mode

Old Joseph Joestar vs. DIO

 * Difficulty: ★★☆☆☆
 * Special Rules
 * Opponent's health continuously refills.
 * Player's HH Gauge continuously refills.
 * Secret Missions

Mohammed Avdol w/Old Joseph vs. Mariah

 * Difficulty: ★★☆☆☆
 * Special Rules
 * Mariah starts with a maxed out Magnetization Gauge that does not decrease.
 * Player's HH Gauge continuously refills.
 * Player's Assist attack decreased.
 * Secret Missions
 * 1) Use a GHA
 * 2) Land the "Crossfire Hurricane" skill
 * 1) Land the "Crossfire Hurricane" skill

Jotaro Kujo vs. Noriaki Kakyoin

 * Difficulty: ★☆☆☆☆
 * Special Rules
 * Opponent's defense decreased.
 * Secret Missions
 * 1) Attack the opponent's Stand
 * 2) Use an HHA

Extra Battles
These are listed as they appear from left to right.

Mariah vs. Diego Brando

 * Difficulty: ★★★☆☆
 * Special Rules
 * Opponent's HH Gauge continuously refills.
 * Secret Missions
 * 1) Down your opponent
 * 2) Reach Level 3 with "Magnetization Gauge" style
 * 3) Land an HHA

Vanilla Ice (Cool Ice) vs. Kars

 * Difficulty: ★★★☆☆
 * Special Rules
 * Kars starts in Ultimate Thing Mode.
 * Opponent can't guard.
 * Player's defense decreased.
 * Secret Missions
 * 1) Win without losing any rounds

DIO vs. Kosaku Kawajiri

 * Difficulty: ★★★☆☆
 * Special Rules
 * Opponent's health continuously refills.
 * Secret Missions
 * 1) Use the "He's... gone!" skill
 * 2) Land a 50 hit combo
 * 1) Land a 50 hit combo

Iggy vs. Koichi Hirose

 * Difficulty: ★★★★☆
 * Special Rules
 * Player's defense decreased.
 * Opponent's health continuously refills.
 * Secret Missions
 * 1) Down your opponent
 * 2) Land the "A nasty habit" skill (air normal  )
 * 1) Land the "A nasty habit" skill (air normal  )

Boss Battles
(Requires 3 battles cleared on same page to unlock)

Jean Pierre Polnareff vs. Vanilla Ice (Cool Ice)

 * Difficulty: ★★★★☆
 * Special Rules
 * Player can't guard.
 * Player's HH Gauge continuously refills.
 * Opponent's attack increased.
 * Secret Missions
 * 1) Call 1 Assist in a single round
 * 2) Land the "Start packing for hell" skill (normal )

Mohammed Avdol vs. Jean Pierre Polnareff

 * Difficulty: ★☆☆☆☆
 * Special Rules
 * Player's Fire damage decreased.
 * Secret Missions
 * 1) Turn your Stand on
 * 2) Attack the opponent's Stand

Jean Pierre Polnareff w/Noriaki Kakyoin vs. Hol Horse

 * Difficulty: ★★☆☆☆
 * Special Rules
 * Hol Horse can't use Centerfold moves.
 * Player's defense decreased.
 * Secret Missions
 * 1) Call 3 Assists in a single round

Old Joseph Joestar w/Mohammed Avdol vs. Mariah

 * Difficulty: ★★☆☆☆
 * Special Rules
 * Mariah starts with a maxed out Magnetization Gauge that does not decrease.
 * Player's Assist attack increased.
 * Secret Missions
 * 1) Call 1 Assist in a single round
 * 2) Land the "Hermit Purple!" skill (stand )
 * 3) Make contact with the "If you're not allowed to touch something, it makes you want to touch it more..." skill

Extra Battles
These are listed as they appear from left to right.

DIO vs. Giorno Giovanna

 * Difficulty: ★★★★☆
 * Special Rules
 * Giorno starts in Golden Wind Requiem.
 * Secret Missions
 * 1) Land the "Right in front of me?!" skill (normal )
 * 2) Win with a GHA
 * 1) Win with a GHA
 * 1) Win with a GHA

Mariah vs. Joseph Joestar

 * Difficulty: ★★★☆☆
 * Special Rules
 * None.
 * Secret Missions
 * 1) Win without losing any rounds
 * 2) Land a Stylish Evade
 * 3) Land an HHA

Noriaki Kakyoin vs. Bruno Bucciarati

 * Difficulty: ★★★☆☆
 * Special Rules
 * Win within a count of 60.
 * Secret Missions
 * 1) Land the First Attack
 * 2) Land the "Emerald Splash" skill
 * 3) Land a 20 hit combo

Hol Horse vs. Funny Valentine

 * Difficulty: ★★★☆☆
 * Special Rules
 * Player's HH Gauge continuously refills.
 * Win within a count of 30.
 * Secret Missions

Boss Battles
(Requires 3 battles cleared on same page to unlock)

Noriaki Kakyoin w/Old Joseph vs. DIO

 * Difficulty: ★★★★★
 * Special Rules
 * Player's defense decreased.
 * Opponent's attack increased.
 * Opponent's health continuously refills.
 * Secret Missions
 * 1) Land the First Attack
 * 2) Land the "Hierophant's Barrier" skill
 * 3) Land a GHA
 * 4) Win with a Dramatic Finish