How to Make More Room in Your Bag on "Pokemon"
By Matt Koble
Updated September 22, 2017
The catchphrase "Gotta Catch 'Em All!" refers to "Pokemon's" creatures, not items. Hoarding the game's items won't give your character back problems, but your bag will fill up and you'll have to leave any new items behind once your bag is full. The Game Boy, Game Boy Color and Game Boy Advance "Pokemon" games limit the player with finite bag space for item storage, a limit that was removed in later games in the series.
Storing Items on the PC
Much like the Pokemon Storage System, earlier games in the "Pokemon" series feature an Item Storage System, letting you free up space in your bag by placing the items in a virtual holding pen. Regardless of the selected game, you can access the PC in the player's home or any Poke Center, and there is no fee to access the Item Storage System.
Whenever possible, opt to sell items you don't want or need to any available Poke Mart. Specifically sell any items like the Nugget, an item that exists only to be sold to a Poke Mart for a tidy profit. Avoid selling rare, one-of-a-kind items like Rare candy or the Master Ball -- once you sell an item to a Poke Mart, you can't get it back.
If your bag is full mid-journey and you're nowhere near a PC or Poke Mart, your only option is to delete something from your bag or leave the new item behind. If you choose to delete something, go for something relatively common or cheap, like a potion or temporary stat boosting battle item, such as X Attack. Keep in mind that once you delete an item, it's gone for good.