Inside the game The Sky Walker Saga PS4, PS5, Xbox, Nintendo Switch, you can introduce some codes to unlock additional characters to use, so far this is the list I’ve found:

CodeCharacter/vehicle
3FCPPVXTarkin
ARVALA7Razor Crest
BAC1CKPMister Bones
C3PHOHOC-3P0 (Party special)
GR2VBXFRatts Tyerell
KH7P320Aayla Secura
KORDOKUPoe Dameron (Party special)
LIFEDAYGNK Droid (Party special)
OKV7TLRDengar
SHUTTLEResistance ITS
SIDIOUSPalpatine
SKYSAGATemmin Wexley
T9LM1QFShmi
TIPYIPSD-O (Party special)
VT1LFNHShaak Ti
WBFE4GONute Gunray
WOOKIEEChewbacca (Party special)
WROSHYRDarth Vader (Party special)
XV4WND9Holdo
Z55T8CQPoggle

Enjoy! (and if you do, you can Buy Me a Coffee )