Reference: Unlock all characters + Nitros Oxide in character select grid

[FeatureSpitter]

Note: This PR is not intended to be merged. It serves as a reference implementation for anyone wanting to unlock all characters and add Nitros Oxide to the character select menu natively.

Summary

All changes are gated behind #ifdef CTR_NATIVE — the original PSX codepath is completely untouched.

1. Unlock all characters on boot (MainMain.c)

Sets gameProgress.unlockFlags |= UNLOCK_CHARACTERS immediately after GAMEPROG_NewGame_OnBoot(), so all secret characters appear with their proper cyan selection borders from the start.

2. Nitros Oxide as 16th selectable character (D230.c, ovr_230.h, MM_Characters.c)

• Expanded CharacterSelectMeta arrays from [0xF] to [0x10]
• Expanded TransitionMeta arrays from [0x15] to [0x16]
• Added Oxide entry at bottom-right of grid (0x160, 0xAE) with D-pad navigation:
  • Right from Fake Crash → Oxide
  • Down from Papu → Oxide
• Bumped NUM_ICONS from 0xF to 0x10
• Updated all layouts: csm_1P2P, csm_1P2P_limited, csm_3P, csm_4P

3. Runtime model loading for Oxide's preview (MM_Characters.c)

The main menu .lev only ships 15 character models. Oxide's hi-res racing model lives in BIGFILE at BI_RACERMODELHI + NITROS_OXIDE. On first access in MM_Characters_GetModelByName, the code:

1. Synchronously loads and pointer-relocates the model via LOAD_DramFile(..., -1)
2. Caches the resulting struct Model * for subsequent frames

This gives a proper 3D preview in the character select window without modifying any binary assets.

4. Asset extraction script (extract_assets.sh)

Robust script for extracting game assets from a retail NTSC-U disc image:

• Supports both .bin/.cue and .iso input
• Builds bchunk from source if not installed
• Extracts XA audio as raw 2352-byte sectors (required for voices/music to work in ctr-native)
• Validates all extracted files

Grid layout

Row 1: [Tropy] [Crash] [Cortex] [Tiny]  [Coco]      [Pinstripe]
Row 2: [Roo]   [N.Gin] [Dingo]  [Polar] [Pura]      [Papu]
Row 3:         [K.Joe] [Penta]  [Fake Crash] [N.OXIDE]

Screenshots

Oxide appears in the grid with proper icon + borders, and his 3D kart model renders in the preview window.

Test plan

• All 16 characters visible and navigable with D-pad
• Oxide's preview model loads correctly from BIGFILE
• Character borders (cyan) display for all unlocked characters
• No regressions: existing 15 characters work identically
• Builds cleanly on Linux x86 (32-bit)

[kkv0n]

well my intention is not to sound harsh or anything, but we already have mods doing what you are describing publicly on CTR-ModSDK repo, for oxide and for unlocking everything custom track mods already documented how

[FeatureSpitter]

well my intention is not to sound harsh or anything, but we already have mods doing what you are describing publicly on CTR-ModSDK repo, for oxide and for unlocking everything custom track mods already documented how

Oh yeah I am quite outside of this loop. I just saw this repo (https://github.com/CTR-tools/ctr-native) on youtube as the first project fully porting CTR to PC, came here and started toying with it. I barely have context.

Do we still need that ModSDK given that ctr-native exists now?

Btw the link in the README for the ghidra folder is broken (https://github.com/CTR-tools/CTR-ModSDK/tree/main/psx-modding-toolchain/games/CrashTeamRacing/ghidra)