Defensively speaking, against most types, the Grass-type are slightly flawed; Template:Type2 moves (and to a lesser extent Template:Type2 moves) are commonly carried by special attackers. An exception to this is certain Template:Type2 Pokémon, many of which carry Hidden Powers of various types (in response to the Template:Type2 Pokémon they cannot normally damage). (If the Hidden Power of said Pokémon is not of the Ice-type, it will be forced to rely on other moves likely lacking same-type attack bonus or support its team via disabling moves, etc.) It is also weak to Template:Type2 and Template:Type2 moves. Given all of this, along with their exposure to a majority of the types (five, tied with Rock-types) , Grass-types are difficult to switch into play. Also, Most of their resistances can be useless; Water-types are able to use Ice Beam, which can cripple Grass-types. They are resistant to Ground but many of them are half Poison-type, which would neutralize their resistance to the powerful and popular Earthquake.
In spite their defensive flaws , it is typical for Grass-types to learn Leech Seed (among other disabling moves). This enables these Pokémon to provide support to the rest of a team, and can make them difficult to faint. In addition, a particular asset of this type is being the only one immune to Leech Seed. However, it can be affected by Leech Seed if the previous Pokémon was seeded and has Baton Passed into a Grass-type Pokémon. Also, resistances to Water-, Electric- and even Template:Type2 help the Grass-type to block common moves.
Offensively, the main problem Grass-type moves face is that nearly all of the few Pokémon they are advantageous against are also weak to moves of other types, hence making them seem dwarfed by the other moves. Other problems are that too many Pokémon types resist these moves to rely on them as a main form of dealing damage, and most of them aren't very powerful, and even then most of the powerful moves have drawbacks, which can cause more trouble. For example, Leaf Storm lowers Special Attack, Wood Hammer causes recoil damage , Frenzy Plant leaves the user immobile, Solarbeam uses one turn to charge, which would make open for a strong attack.
Making matters worse, the majority of Grass-types have very narrow movesets, often where the only damage-dealing level up moves are Grass-type and Template:Type2 moves (as seen in the movesets of Meganium, Cherrim, and Sunflora families, among others).What the Grass-type is best at is taking down Water/Ground Pokémon (like Swampert), Rock/Ground Pokémon (which are rather common) on which they deal four times normal damage; additions seen such as Grass Knot in later generations have also made the type more attractive in this regard.
Grass Pokémon seem to be affected by weather conditions more than most other Pokémon. This makes sense due to their closeness with plants and nature. Most power up under intense sunlight, while a few others work best under other conditions. Pokémon such as Ludicolo in heavy rain, Cacturne in sandstorms or Abomasnow in hailstorms are such Grass-types.
When used in contests, Grass-type moves typically become Smart moves, but can also be any of the other four Contest types.
In total, there are 55 Pokémon with the Grass-type.