Trainers who really want to be the very best in Pokémon Brilliant Diamond and Shining Pearl will need to embrace the idea of type strengths and weaknesses. All Pokémon types have other Pokémon that they are just better against in a battle. Knowing the best Pokémon to break out depending on your opponent is very important.
It can be difficult to keep all this information in mind, so below you will find a quick and easy cheat sheet with all the information that you need for each type. If you are looking to quickly find something to use against a particular type, just find the enemy type on the left, then track along to the weaknesses column to find out what to use against it.
Remember, super effective against means it will do the most damage to that type, while not very effective against means you are basically wasting your attacks against enemies in that section.
| Type | Super Effective Against | Not Very Effective Against | Weaknesses | Immunity Against | No Effect |
| Bug | Dark, Grass, Psychic | Fighting, Flying, Poison, Ghost, Steel Fire | Fire, Flying, Rock | ||
| Dark | Ghost, Psychic | Fighting, Dark, Fairy | Bug, Fairy, Fighting | ||
| Dragon | Dragon | Steel | Dragon, Fairy, Ice | Fairy | |
| Electric | Flying, Water | Dragon, Grass, Electric | Ground | Ground | |
| Fairy | Dark , Dragon, Fighting | Fire , Poison, Steel | Poison, Steel | Dragon | |
| Fighting | Dark, Ice, Normal, Rock, Steel | Bug, Fairy , Flying, Poison, Psychic | Fairy, Fighting, Psychic | ||
| Fire | Bug, Grass, Ice, Steel | Dragon, Fire, Rock, Water | Ground, Rock, Water | ||
| Flying | Bug, Fighting, Grass | Electric, Rock, Steel | Electric, Ice, Rock | Ground | |
| Ghost | Ghost, Psychic | Dark | Dark , Ghost | Normal | |
| Grass | Ground, Rock, Water | Bug, Fire, Flying, Grass, Poison, Steel | Bug, Fire, Flying, Ice, Poison | ||
| Ground | Electric, Fire, Poison, Rock, Steel | Bug, Grass | Grass, Ice, Water | Electric | |
| Ice | Dragon, Flying, Grass, Ground | Fire, Ice, Steel, Water | Fighting, Fire, Rock, Steel | ||
| Normal | Rock, Steel | Fighting | Ghost | ||
| Poison | Fairy, Grass | Ghost, Ground , Poison, Rock | Ground, Psychic | Steel | |
| Psychic | Fighting, Poison | Psychic, Steel | Bug, Dark , Ghost | ||
| Rock | Bug, Fire , Flying, Ice | Fighting, Ground , Steel | Fighting, Grass , Ground, Steel , Water | ||
| Steel | Fairy, Ice , Rock | Electric, Fire , Steel, Water | Fighting, Fire , Ground | Poison | |
| Water | Fire , Ground, Rock | Dragon, Grass , Water | Electric, Grass |
