All-Star Battle R/Koichi Hirose

"A new Echoes! (「新しいエコーズ」)"

Koichi Hirose (広瀬 康一) was confirmed to return for during the game's initial announcement trailer.

His moveset is fundamentally the same as his from, with a few tweaks being made to both balance the character and fit him into the overall gameplay tweaks that All-Star Battle R brought.

In the English localization of the game, Koichi's Stand, Echoes, is localized as "Reverb", carried on from its debut.

Replacing Koichi's previous voice actor, Romi Park, is Yuki Kaji, who has voiced him since the Diamond is Unbreakable anime adaptation. Because of this, and like the majority of the game's roster, voicelines for Koichi were either added or re-recorded.

Gameplay
Koichi has 900 health and uses the Stand (スタンド) Battle Style, fighting foes with Echoes. During a fight, he can use various moves from his appearance in Diamond is Unbreakable.

General Changes

 * Koichi's run speed in User Mode has been reduced.
 * 3 Freeze now prevents opponents from dodging and stylish guarding, making it a much more difficult effect to deal with. This is especially potent when his Assault Assist, which inflicts the effect, is paired with a character that has an Unblockable attack as it makes it impossible for the opponent to prevent the attack from hitting.

Dialogue
Outside of, Koichi has unique dialogue for both his match entrances and victories when facing certain characters.

All-Star Battle Mode
All missions in starring Koichi as either the Player or Enemy, in order of appearance.

Music
Koichi's theme is Does This Mean I've Gotten Stronger?! (ひょっとして成長したんですかァ！？), and can be unlocked in-game by winning with a Dramatic Finish in 's Koichi vs Normal Battle.

Its name is in reference to Koichi saying the line "Does that mean I got stronger again?" in Chapter 93 of Diamond is Unbreakable in response to Echoes ACT 2 evolving into Echoes ACT 3.

1.4.0

 * Standing Middle Attack [Stand On]
 * Extended reach.
 * Increased damage.
 * Increased number of hits so it is easier to use in combos. (2 hits)
 * Crouching Heavy Attack [Stand On]
 * Increased duration of hitbox.
 * This move now knocks the opponent into the air instead of knocking them to the ground.
 * Increased amount of float.
 * Decreased recovery time.
 * Jumping Medium Attack [Stand On]
 * Increased number of hits so it is easier to use in combos. (2 hits)
 * Increased damage.
 * Jumping Heavy Attack [Stand On]
 * Increased duration of hitbox.
 * Increased damage.
 * "S-H-I-T" skill ( and versions)
 * Added ability to hit downed opponents.

1.6.0

 * Crouching Heavy Attack [Stand On]
 * Increased recovery time.

2.0.0

 * 3 Freeze
 * When affected by 3 Freeze (put in a gravitated state), the opponent can no longer Dodge.
 * Backdash
 * Fixed Koichi's hurtbox so that it matches the animation rather than extending above where he visually is.
 * Throw
 * Increased recovery time.
 * Added ability to Flash Cancel the recovery when successful.
 * This makes it so while it is still possible to connect "S-H-I-T" after a throw, it can only be done at the cost of Heart Heat.
 * "Boing!" skill
 * Fixed a bug where if Koichi used this skill and then activated this trap himself while in Stand Mode, it would prevent him from dismissing Echoes.
 * "S-H-I-T" skill
 * Decreased the total duration of 3 Freeze applied by the last hit.
 * This change applies to the Assault Assist as well as this is the skill it uses.
 * "Echoes ACT 3: Freeze!" HHA
 * Fixed a bug where, if Echoes triggered a trap previously placed by the "Boing!" skill while Koichi was in Stand Mode, Koichi would continue performing this HHA.

2.1.0

 * 3 Freeze (Gravitated state)
 * Fixed a bug where the opponent would not be able to Dodge when affected by 3 Freeze.
 * Added ability to Stylish Guard and Stylish Evade while affected by 3 Freeze.
 * Standing Medium Attack [Stand Off]
 * Increased number of hits.
 * Decreased pushback to improve usability.
 * Jumping Medium Attack [Stand Off]
 * Increased number of hits.
 * Increased damage.
 * "Stop it!" special
 * Added the ability to cancel this command normal with Quick Stand on.
 * Increased the distance Koichi moves forward while attacking.
 * "Sizzle" skill
 * Added a hitbox to ACT2's tail when throwing the SFX projectile.
 * Added the ability for the SFX projectile to hit downed opponents.
 * Decreased the time it takes for the SFX projectile to spawn for the and  variants.
 * Adjusted the trajectory of the SFX projectile for the and  variants by reducing the height it is tossed to.