All-Star Battle R/Parallel World Diego

"THE WORLD... it's Me Time now. (オレだけの時間だぜ)"

Parallel World Diego (並行世界から来たディエゴ), along with THE WORLD, was confirmed for as the fourth paid, playable DLC character on May 31, 2023, and is slated for released on June 16, 2023. Like the first three paid DLC characters, he is included inside the game's first Season Pass, and therefore also the Digital Deluxe Edition and Ultimate Edition.

Carried on from, Parallel Diego's name is localized as "Alternate World Diego" in the English localizations of All-Star Battle R, differing from what his Japanese name would suggest being translated as.

His moveset is similar to that of his appearance, with modifications made and new aspects added to better fit him in with All-Star Battle R's different style of gameplay.

As the voice actor for Parallel World Diego, among other iterations of Dio Brando, since Eyes of Heaven, Takehito Koyasu reprises his role in All-Star Battle R as well. Like with the majority of the roster that have returning voice actors from Eyes of Heaven, voicelines for Parallel World Diego were added and re-recorded.

Gameplay
Parallel World Diego has 920 health and uses the both the Mounted (騎乗) and Stand (スタンド) Battle Styles, fighting foes with Silver Bullet and THE WORLD. During a fight, he can use several different attacks that were featured in Steel Ball Run. Unlike most other characters that use the Stand Battle Style, Parallel World Diego cannot manually summon and dismiss his Stand; instead, the Stand remains active as long as the user is dismounted, and appears instantaneously for any attacks that utilize it while the user is mounted.

Three parts of the Holy Corpse will slowly appear scattered across the stage when Parallel World Diego is a combatant. He can pick up these pieces to receive blessings that boost his performance in combat. If Parallel World Diego is pitted against, , , , or another Parallel World Diego, both players will have to fight over the three Corpse Parts, as only one set will appear.

Dialogue
Outside of, Parallel World Diego has unique interaction dialogue for both his match entrances and victories when facing certain characters.

Music
Parallel World Diego's theme is Me Time (オレだけの時間だぜ), and and is automatically unlocked when purchasing Parallel World Diego's DLC.

Its name is a reference to some of the first words he says to Johnny Joestar when he finally reveals himself in Chapter 90 of Steel Ball Run.