There are various battle scenarios where you can use items:
1. In-Battle Items:
* Held Items: These are items your Pokémon hold during battles. They provide passive effects, like boosting stats, inflicting status conditions, or triggering special abilities.
* Battle Items: You can use these during battles by selecting them in the menu. They can provide a temporary boost to your Pokémon, heal them, or change the course of the battle.
* Field Items: Certain items can be used outside of battle to interact with the environment. These are often used to change the terrain or affect the weather.
2. Battle Modes:
* Gym Battles: You can use held items and battle items in Gym Battles.
* Trainer Battles: You can use held items and battle items in Trainer Battles.
* Wild Encounters: In some cases, you can use battle items during wild encounters.
* Competitive Battles: Held items are essential in competitive battles, and some battle items are allowed depending on the format.
To use items in a battle:
1. Choose an item: Select the item you want to use from your bag.
2. Select a Pokémon: If using a battle item, choose the Pokémon you want to target.
3. Confirm your selection: Confirm your choice to use the item.
Important Notes:
* Not all items can be used in all battle situations.
* The effects of items can vary depending on the item, the Pokémon using it, and the opponent.
* Some items are restricted in competitive battles, so be sure to check the rules for the format you are playing.
Specific Examples:
* Held Item: Leftovers restores a small amount of HP each turn.
* Battle Item: X Attack temporarily boosts a Pokémon's Attack stat.
* Field Item: Max Revive fully revives a fainted Pokémon.
To get more specific help, please tell me:
* Which Pokémon game are you playing?
* What type of battle are you trying to use items in?
* What item are you trying to use?
I hope this information helps!