[Feature] Adds Expert Pokemon Breeder Mystery Encounter to the game

[ben-lear]

What are the changes the user will see?

Adds a new ME called "The Expert Pokemon Breeder"

See Issue: #3818

Why am I making these changes?

Final Ultra ME that was being added for release

What are the changes from a developer perspective?

Screenshots/Videos

chrome_yDXCPLQlea.mp4

chrome_sfQhHuzTco.mp4

How to test the changes?

can run locally and set MYSTERY_ENCOUNTER_OVERRIDE to MysteryEncounterType.THE_EXPERT_BREEDER (and set MYSTERY_ENCOUNTER_RATE_OVERRIDE to 256, and be on a valid ME wave)

Checklist

• I'm using beta as my base branch
• There is no overlap with another PR?
• The PR is self-contained and cannot be split into smaller PRs?
• Have I provided a clear explanation of the changes?
• Have I considered writing automated tests for the issue?
• If I have text, did I make it translatable and add a key in the English locale file(s)?
• Have I tested the changes (manually)?
  • Are all unit tests still passing? (npm run test)
• Are the changes visual?
  • Have I provided screenshots/videos of the changes?

[DayKev]

const overrides = {
  MYSTERY_ENCOUNTER_RATE_OVERRIDE: 256,
  MYSTERY_ENCOUNTER_OVERRIDE: MysteryEncounterType.THE_EXPERT_BREEDER,
  STARTING_WAVE_OVERRIDE: 11,
  STARTING_LEVEL_OVERRIDE: 10
} satisfies Partial<InstanceType<typeof DefaultOverrides>>;

It didn't appear when I used these overrides, instead I got the Wobuffet ME (then after starting a new run I got some Oricorio ME).