How do you get through the metal door on river level Pokemon Snap?

You can't get through the metal door on River Level in Pokémon Snap. That door is a visual element, and you're not meant to go through it. It's there to add to the atmosphere and create a sense of mystery.

You can only access the areas that the game's path allows, so you'll need to stick to the designated routes to progress through the level and encounter the various Pokémon.

If you're looking for specific Pokémon, you'll need to explore the rest of the River Level and try different tactics, such as using your Pester Ball, Flash, or specific items to attract them to your view.

Remember, exploration and experimentation are key to finding all the Pokémon and achieving the best photos in Pokémon Snap!