How do you switch players in the P1 position in Kirby's return to dreamland?

In "Kirby's Return to Dream Land," to switch players in the P1 position, you need to pause the game by pressing the start button. Then, navigate to the "Change Player" option in the pause menu. Select the desired player from the list of connected controllers, and confirm your choice. This will switch the player in the P1 position to the selected character.