Tekken 6 for PS4 & PS5 is a PSP Remake
What Is -- Tekken 6
(link) the PS3 version of the game review.
Tekken 6 on the PS4 (or PS5) is a offline only 1 player game that minus those 2 facts is similar to the PS3 Tekken 6 game which had multiplayer and supported 2 players and in the PS3 Tekken 6 it had a "scenario campaign" with run around 3D levels. Here the PSP version plays the same has a different clothing customization feature, and in this PSP remake it is Time Attack, Survival and Gold Rush for bonus modes. Gold Rush is just fighting a character that drops gold coins to collect for additional way to earn money for unlocking clothing customization.
here is a video review [Tekken 6 - Baek Gameplay - on PS4 & PS5 - Review PSP Version]
https://www.youtube.com/watch?v=96-ry3dORVU
(link)
On PS4 for control setup you can hold a button here to scroll change it and
in "custom button assignments" in the menu set R1 to be R2.
On PSP here its a 6 button game instead of 8. Has all mix of combos LP, RP, LK, RK.
Customization you can swap default colors for free and buy new items here.
Modes: Arcade, Story, etc...
Practice mode is 1 stage either select walls on or off.
There is no way to use a 2 player controller even in practice mode.
You can set it either do nothing, fight back, or do specific move list moves, either slow, mid or fast.
Pause menu move list "Command List" is available.
Also plays the demo or can be placed above the character in practice mode.
So Tekken 6 for PS3 would have been better, but this is only 960mb in size less than 1 GB.
Been good if Tekken Tag Tournament 2 and Tekken Hybrid were also available.
PSN Store info.
In Arcade Battle after 5 enemy you fight the large robot Nancy-MI847J for a bonus win or not, then Jin, then Azazel the large dragon. Very difficult final boss. There is Story mode that unlocks movies for each character 40 of them. You can set the difficulty and round count in options.

ALL 40 CHARACTERS: (It's 41 with Panda under Kuma.)
Alisa Bosconovitch ................ (Girl) (Robot) (NEW)
Anna Williams ....................... (Girl)
Armor King II ......................... (Boy)
Asuka Kazama ....................... (Girl)
Baek Doo San ........................ (Boy)
Bob Richards ......................... (Boy) (NEW)
Bruce Irvin ............................. (Boy)
Bryan Fury ............................. (Boy)
Christie Monteiro .................. (Girl) (Eddy Clone)
Craig Marduk ........................ (Boy)
Devil Jin ................................. (Boy)
Eddy Gordo ........................... (Boy)
Feng Wei ............................... (Boy)
Ganryu .................................. (Boy)
Heihachi Mishima ................. (Boy)
Hwoarang .............................. (Boy)
JACK-6 ................................... (Boy) (Robot)
Jin Kazama ............................. (Boy)
Julia Chang ............................ (Girl)
Kazuya Mishima .................... (Boy)
King ....................................... (Boy)
Kuma ..................................... (Boy) (Bear)
Lars Alexandersson ............... (Boy) (NEW)
Leo Kliesen ........................... (Girl) (Boy) (NEW)
Lee Chaolan .......................... (Boy)
Lei Wulong ............................ (Boy)
Lili De Rochefort ................... (Girl)
Ling Xiaoyu ........................... (Girl)
Marshall Law ........................ (Boy)
Mokujin ................................ (Girl) (Boy) (Plays all characters randomly round to round)
Miguel Caballero Rojo .......... (Boy) (NEW)
Nina Williams ....................... (Girl)
Panda ................................... (Girl) (Bear) [Under Kuma Select]
Paul Phoenix ........................ (Boy)
Raven ................................... (Boy)
Roger Jr. ............................... (Boy) (Kangaroo)
Sergei Dragunov .................. (Boy)
Steve Fox ............................. (Boy)
Wang Jinrei .......................... (Boy)
Yoshimitsu ........................... (Boy) (From Soul Calibur)
Zafina ................................... (Girl)
Here is a video of the character select screen showing each. Plus Lei Wulong practice gameplay.
https://youtu.be/KQYKFVfb_m8
Button Settings:
L1 = LP+RP
R1 = LK+RK
Square = LP
Triangle = RP
Circle = RK
X = LK
Options to assign = LP+RK, (LP+LK), (RP+RK), RP+LK, LP+RP, LK+RK, OFF,
LP+LK = Grab
RP+RK = Grab