Open Routes 35 to 37, the National Park and Ecruteak to the Fog Badge (#32)

Enable Route 35, Route 36, Route 37, the National Park and its gates,
Ecruteak City and its buildings, the Tin Tower entrance, the Wise Trio's
room and both floors of the Burned Tower. The story runs from Floria,
the SquirtBottle and Sudowoodo through the Kimono Girls' HM03 Surf, the
rival in the Burned Tower and the beasts' release to Ecruteak Gym,
Morty, the FOGBADGE and TM30.

Port roaming Pokémon (InitRoamMons, UpdateRoamMons, JumpRoamMons,
CheckEncounterRoamMon) with their state in the save; only Continue moves
them on restore, so a failed import's rollback keeps them in place.
Port the Bug-Catching Contest: registration on contest days, Park Balls,
contestants, the timer, QUIT, the catch-and-swap prompt, judging from
the ROM's contestant table, prizes and the saved contest state.

Port the Game Corner's SlotMachine and CardFlip on a new realtime tile
screen that advances two frames per tick with buffered buttons: reel
strips and scrolling, bias tables, the seven streak, Golem and Chansey,
payouts, the Card Flip board, cursor and navigation. Their tilemaps are
checked against the ROM's own data.

Also port getnum, a plain warp that continues its script on the new map,
and PokemonNames' EGG entry. A trainer whose script is ObjectEvent (the
Burned Tower rival) is no longer sighted once its own flag is set, as
the original's read of bit 1 of wNumKeyItems gives with the usual key
items.

The playthrough walks through the National Park and continues to Morty;
its driver chooses moves by type matchup, buys at Marts and uses Super
Potions and Awakenings in trainer battles. New tests cover roaming, the
contest, the Game Corner and Ecruteak's side content.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

docs/NATIVE_PORT.md

@@ -47,6 +47,10 @@ These paths refer to the pinned [PRET source](https://github.com/pret/pokecrysta
 | `game/scripts/ruins.ts`          | `engine/events/unown_walls.asm`, `data/events/unown_walls.asm` | `DisplayUnownWords` as an overlay screen with the chamber tileset's Unown letters, `HoOhChamber` and `OmanyteChamber`. |
 | `game/scripts/goldenrod.ts`, `game/world/day-timers.ts` | `engine/events/name_rater.asm`, `haircut.asm`, `lucky_number.asm`, `engine/overworld/time.asm`, `engine/menus/intro_menu.asm` | Name Rater ownership checks, ROM haircut happiness tables, Lucky Number party and box matching with first-winner ties, saved number and Friday countdown with 140-day rollover. |
 | Goldenrod shops, gifts and prizes | `engine/items/mart.asm`, `engine/pokemon/move_mon.asm` (`GivePoke`), `engine/events/specials.asm` (`GameCornerPrizeMonCheckDex`), `engine/pokedex/new_pokedex_entry.asm` | All five mart types, gift OT/nickname and MAIL, full-party gifts to the box, coin commands and balance boxes, and first-owned prize registration with two A/B pages. Boxed gifts approximate an unspecified stale enemy held item as zero. SlotMachine and CardFlip remain refused. |
+| Route 35, Route 36, Route 37, Ecruteak and Burned Tower | `home/trainers.asm` (`_CheckTrainerBattle`), `mobile/mobile_41.asm` (`CheckMobileAdapterStatusSpecial`), `engine/overworld/overworld.asm` (`LoadUsedSpritesGFX`, `RefreshSprites`) | These maps' scripts (Floria and the Sudowoodo Squirtbottle battle, Arthur, Sunny, the Itemfinder house, the Kimono Girls and HM03 Surf, Eusine and the rival's Burned Tower cutscene) run on already-ported primitives. `checkTrainers` skips a map trainer whose script is `ObjectEvent` (the Burned Tower rival) once its own flag is set: the original reads `ObjectEvent`'s bytes as flag $f251, bit 1 of `wNumKeyItems` through echo RAM, which is set with the usual two or three key items; the other case is unverified. `CheckMobileAdapterStatusSpecial` is unused outside the Japanese release and always clears its result; `LoadUsedSpritesGFX`/`RefreshSprites` are VRAM sprite tile loading, presentation only. |
+| `game/world/roam-mons.ts` | `engine/overworld/wildmons.asm` (`InitRoamMons`, `CheckEncounterRoamMon`, `UpdateRoamMons`, `JumpRoamMons`), `data/wild/roammon_maps.asm` | Raikou and Entei roam from `InitRoamMons`; Suicune's slot is kept but not started. `UpdateRoamMons` runs on connections, door and pit warps and after one wild battle in sixteen; `JumpRoamMons` on Fly, Teleport and Continue. A roaming beast can take a grass encounter, and the battle writes its HP back or clears the slot. |
+| Bug-Catching Contest | `engine/events/bug_contest/*.asm`, `maps/Route35NationalParkGate.asm`, `maps/Route36NationalParkGate.asm`, `engine/menus/start_menu.asm` | Registration, Park Balls, contestant selection, the timer on the game clock, out of balls, QUIT, judging from `BugContestantPointers` with ties to the earlier entry, prizes and `CheckPartyFullAfterContest`. The contest state saves. The status box is a text page above the start menu. No sound. |
+| `game/scripts/slot-machine.ts`, `game/scripts/card-flip.ts` | `engine/games/slot_machine.asm`, `engine/games/card_flip.asm`, `engine/gfx/cgb_layouts.asm` | Both on a realtime tile screen (two frames per tick, buffered buttons). Slots: reel strips, spin rates and scrolling, bias tables with the lucky machine and seven streak, reel 3's Golem and Chansey replay with their sprites, payouts. Card Flip: deck, 12×11 board, cursor sprites and `ChooseCard_HandleJoypad`, paytable. Tilemaps are checked against the ROM. Golem's walk uses two ROM frames with flips; no sound. |
 | Text interpreter                 | `macros/scripts/text.asm`, `constants/charmap.asm`, `home/text.asm`                                                            | Literal/far text, RAM names and string buffers from native state, numbers of dots, and sound or pause cues (consumed). `text_asm` and other RAM reads are refused.                                                                      |
 
 Supported event opcodes are explicit in the interpreter switch. Audio commands consume their operands, but sound sequencing is pending; those opcodes do not imply complete audiovisual behavior. `pause` holds the current text or waits the original number of overworld ticks.