The Glitch:
* Misty's Disappearance: In the game, Misty is supposed to be at Bill's house before you enter the Power Plant. However, sometimes she simply doesn't show up, and the game doesn't trigger the encounter with her.
Potential Solutions:
1. Save and Reset: This is the most common solution.
* Save your game at a Pokemon Center or other save point.
* Reset the game by turning it off and back on.
* Load your saved file and try going to Bill's house again.
* Important: You need to have already defeated the gym leaders in Viridian City and Pewter City for this to work correctly.
2. Try a Different Area: Sometimes restarting the game or visiting other areas can help trigger events.
* Try visiting other areas of the game, like the Celadon City Department Store or other routes.
* Return to Bill's house after spending some time in other areas.
3. Use the Action Replay: If you have an Action Replay device for your DS, you can use it to manipulate the game's code. There are codes available online that might help force Misty's appearance. However, use this solution with caution as it could cause other issues within the game.
4. Try a New Save File: If all else fails, you might need to start a new game file. This is usually a last resort, but if the issue persists, it could be your only option.
Additional Tips:
* Check Your Progress: Make sure you have defeated the gym leaders in Viridian City and Pewter City. If you haven't, Misty won't be at Bill's house.
* Wait for a While: Sometimes, it takes a few in-game days for events to trigger. If you've tried the other solutions, try waiting a few days and then revisit Bill's house.
If Nothing Works:
* If you've tried all of these solutions and still can't find Misty, unfortunately, the glitch might be deeply embedded in your game. You might need to consider starting a new game file.
Remember, the "Save and Reset" method is often the most effective way to resolve glitches in Pokemon games. If that doesn't work, exploring the other options may be necessary.