How do you get the pokeflute?

You can't actually get a "Pokeflute" in any Pokemon game. It's a fictional item that doesn't exist.

It's possible you're thinking of the S.S. Ticket, which is an item used to access the S.S. Anne in Pokemon Red and Blue. The S.S. Anne is a cruise ship where you can encounter certain Pokemon, including the rare Snorlax.

To get the S.S. Ticket, you need to:

1. Beat the first gym leader, Brock.

2. Speak to the old man standing in front of the S.S. Anne entrance in Vermilion City.

However, if you're talking about a different item, please provide more context, and I'll do my best to help you! 😊