Chocobo GP for the Nintendo Switch is no longer receiving major content updates or new DLC. Following the release of the Season 5 update in December 2022, Square Enix shifted the game into a "complete edition" state, removing microtransactions and making previously restricted content earnable through gameplay. Latest Update and DLC Status Chocobo GP - SQUARE ENIX Support Center
These are often labeled as:
Chocobo GP [NSP] [Update v1.4.0] [DLC Unlocker] [NEW] [SUXXORS]
Launch the game. Go to "Garage" -> "Character Select". You should see:
Given that your keyword includes "new", you might be deciding whether to invest time/money. Here is the verdict based on the 1.4.0 + all DLC version:
Character Roster: The total playable roster has grown to over 34 characters, including legends like Cloud Strife (FFVII) and Squall Leonhart (FFVIII). Where to Buy Chocobo GP
Whether you update via official eShop or preserve the complete NSP on your modded hardware, make sure you are on version 1.4.0 with the Season 1-4 unlocker. That is the definitive, no-compromise Chocobo GP.