[Balance] Set the IVs of default starters to 15

[frutescens]

What are the changes the user will see?

The default starters will all start with IVs of 15. In addition, Fresh Start Challenge will also respect this change and starters will have IVs of 15.

Why am I making these changes?

Balance Team request.

What are the changes from a developer perspective?

game-data.ts and challenges.ts edited for this change.

Screenshots/Videos

Screen_Recording_2024-11-13_at_12.32.06_PM.mov

How to test the changes?

1. Start a new save file + Look at the IVs of the starters in starter-selection
2. Start a Fresh Start run -> IVs of the starters should be all set to 15

Checklist

• I'm using beta as my base branch
• 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]

Might want to add some sort of save migration later as well.

[Tempo-anon]

What happens if you use a save file with IVs under 15?

[DayKev]

What happens if you use a save file with IVs under 15?

It shouldn't do anything at all, if initDexData() overwrote existing saves then no one would be able to get better IVs/etc for their starters.

[Tempo-anon]

Seems just a little weird that older accounts will technically have a bit worse IVs for some mons vs newer accounts but 🤷

[frutescens]

Seems just a little weird that older accounts will technically have a bit worse IVs for some mons vs newer accounts but 🤷

@Tempo-anon closer to the update, I'll make sure to include it in any save conversion + write a save converter myself.