Here are some Pokémon Y and X cheats and tips. Or X and Y... That sounds better. Heal party anywhere without items
To fully restore your party anywhere in the game, simply start a wireless battle. If your opponent accepts, once you are returned to the overworld, your entire party will be in perfect health.Mewtwo Sidequest
After beating the Elite 4, return to Pokemon Village. At the top of the area, there should be a cave that was blocked off before. Inside there will be a level 70 Mewtwo.Zygarde Sidequest
After beating the Elite 4, return to Terminus Cave. You'll be able to reach the lowest level of the cave, which has a few rare items and a level 70 Zygarde.