First, please note that Traits only appear in the Third Generation. Each Pokémon has an Trait, or Ability, and they will benefit the Pokémon in one way. Some Pokémon has unique Traits that only that Pokémon can have. Note
that these are not moves, but they will activate indefinately or when an event happened. You do not "use" these Traits, but they are automatic. Right now, it's only important that you know Traits exist and that they are something not to overlook. Below is the list of all the Abilities in alphabetical order and what they do. For the sake of simplicity, they will not include their functions in the field, but just in battles.
1) Air Lock When a Pokémon with this Trait is active, all effects of the current weather are completely negated.
2) Arena Trap Pokémon with this Trait prevent any opposing Pokémon from leaving play, except those that are Flying type or possess the Trait Levitate.
3) Battle Armor Pokémon with this Trait have a thick layer of armor that prevents Critical Hits.
4) Blaze When the HP of a Pokémon with this Trait falls below 1/3 it's total HP, that Pokémon's Fire type attacks will do 1.5x damage.
5) Cacophony Pokémon with this Trait negate the effects of Sound Moves by drowning them out.
6) Chlorophyll Pokémon with this Trait absorb sunlight to double their Speed while it is Sunny.
7) Clear Body Pokémon with this Trait are completely immune to all stat-lowering attacks.
8) Cloud Nine When a Pokémon with this Trait is active, all effects of the current weather are completely negated.
9) Color Change When a Pokémon with this Trait is attacked, it will change its type to that of the move it was hit with.
10) Compoundeyes Pokémon with this Trait have large eyes, making all attacks 30% more accurate.
11) Cute Charm When a Pokémon with this Trait is attacked with a Contact Move, there is a 30% chance of the attacker becoming Attracted if the attacker is of the opposite gender.
12) Damp When a Pokémon with this Trait is active, the battle arena becomes so damp that no active Pokémon can use Explosion or Selfdestruct.
13) Drizzle Pokémon with this Trait cause Rain to fall for the remainder of the battle when they enter play.
14) Drought Pokémon with this Trait cause the weather to be Sunny for the remainder of the battle when they enter play.
15) Early Bird When a Pokémon with this Trait falls asleep, the duration of its sleep will be only half as long as it would have been.
16) Effect Spore When a Pokémon with this Trait is attacked with a Contact Move, there is a 10% chance of the attacker becoming either Paralyzed, Poisoned, or Asleep.
17) Flame Body When a Pokémon with this Trait is attacked with a Contact Move, there is a 30% chance of the attacker becoming Burned.
18) Flash Fire When a Pokémon with this Trait is attacked with a Fire type move, it becomes immune to all Fire type moves, and its own Fire type moves become 1.5x more powerful.
19) Forecast Pokémon with this Trait change their type according to the weather.
20) Guts When a Pokémon with this Trait receives a status ailment, its Attack is increased by 1.5x.
21) Huge Power Pokémon with this Trait have double their normal Attack.
22) Hustle Physical attacks from Pokémon with this Trait do 1.5x more damage, but their accuracy is 20% lower.
23) Hyper Cutter Pokémon with this Trait are extremely fierce, and their Attack cannot be lowered.
24) Illuminate Pokémon with this Trait emit a warm glow that attracts wild Pokémon. It has no effect in battle.
25) Immunity Pokémon with this move have a natural immunity to all forms of Poison.
26) Inner Focus Pokémon with this Trait concentrate intensely to prevent Flinching.
27) Insomnia Pokémon with this Trait are unable to fall Asleep.
28) Intimidate When Pokémon with this Trait enter play, their presence is so intimidating that any opposing Pokémon has its Attack reduced by one level.
29) Keen Eye Pokémon with this Trait have exceptional vision, and their Accuracy cannot be lowered.
30) Levitate Pokémon with this Trait can float in the air, thereby avoiding all Ground type attacks.
31) Lightning Rod When a Pokémon with this Trait is in play, all Electric attacks are drawn to it, regardless of the intended target.
32) Limber Pokémon with this Trait have extremely flexible bodies that are unable to be Paralyzed.
33) Liquid Ooze When Pokémon with this Trait are attacked by a HP draining attack, such as Giga Drain, the attacker's HP will drop instead of rise.
34) Magma Armor Pokémon with this Trait are covered in a burning exterior that prevents Freezing.
35) Magnet Pull Pokémon with this Trait are magnetically charged and will prevent all Steel type Pokémon from leaving play.
36) Marvel Scale When a Pokémon with this Trait receives a status ailment, its Defense is increased by 1.5x.
37) Minus If the Ally of a Pokémon with this Trait has the Trait "Plus", its Special Attack will be 1.5x greater.
38) Natural Cure Pokémon with this Trait posses the ability to cure themselves upon leaving play.
39) Oblivious Pokémon with this Trait are immune to the move Attract.
40) Overgrow When the HP of a Pokémon with this Trait falls below 1/3 it's total HP, that Pokémon's Grass type attacks will do 1.5x damage.
41) Own Tempo Pokémon with this Trait have unique minds and cannot become Confused.
42) Pickup Pokémon with this Trait have a chance to pick up items after battles with wild Pokémon. It has no effect in battle.
43) Plus If the Ally of a Pokémon with this Trait has the Trait "Minus", its Special Attack will be 1.5x greater.
44) Poison Point When a Pokémon with this Trait is attacked with a Contact Move, there is a 30% chance of the attacker becoming Poisoned.
45) Pressure When a Pokémon with this Trait is attacked, the attacker loses an extra PP from the attack it used.
46) Pure Power Pokémon with this Trait have double their normal Attack.
47) Rain Dish Pokémon with this Trait use a dish atop their heads to collect rainwater and use it to heal themselves by 1/16 of their total HP each turn it Rains.
48) Rock Head Pokémon with this Trait have a thick skull that prevents recoil damage from moves such as Double-Edge.
49) Rough Skin Pokémon with this Trait have extremely coarse skin that damages any Pokémon that uses a Contact Move against it by 1/16 of their total HP.
50) Run Away Pokémon with this Trait can flee from wild Pokémon without fail. It has no effect in battle.
51) Sand Stream Pokémon with this Trait cause a ferocious Sandstorm to rage for the remainder of the battle when they enter play.
52) Sand Veil Pokémon with this Trait are slightly more evasive during a Sandstorm.
53) Serene Grace When a Pokémon with this Trait uses an attack that has an extra effect, the chances of the effect occurring are doubled.
54) Shadow Tag Pokémon with this Trait possess the ability to freeze the shadows of opponents and prevent them from leaving play.
55) Shed Skin When a Pokémon with this Trait has a status ailment, there is a 30% chance each turn of the Pokémon shedding the ailment.
56) Shell Armor Pokémon with this Trait have a thick layer of armor that prevents Critical Hits.
57) Shield Dust Pokémon with this Trait are coated in a strange powder that the negates the extra effects of most moves.
58) Soundproof Pokémon with this Trait are completely immune to all Sound Moves.
59) Speed Boost The Speed of any Pokémon with this Trait rises by one level at the end of every turn.
60) Static When a Pokémon with this Trait is attacked with a Contact Move, there is a 30% chance of the attacker becoming Paralyzed.
61) Stench Pokémon with this Trait posses an unbearable stench that keeps away wild Pokémon. It has no effect in battle.
62) Sticky Hold Pokémon with this Trait cannot have their item stolen in any way.
63) Sturdy Pokémon with this Trait are completely immune to all One-Hit KO attacks.
64) Suction Cups Pokémon with this Trait use suction cups to anchor themselves, negating the effects of Roar and Whirlwind.
65) Swarm When the HP of a Pokémon with this Trait falls below 1/3 it's total HP, that Pokémon's Bug type attacks will do 1.5x damage.
66) Swift Swim Pokémon with this Trait use their incredible swimming ability to double their Speed while it is Raining.
67) Synchronize When a Pokémon with this Trait becomes Paralyzed, Poisoned, or Burned, the Pokémon that inflicted it receives the same status as well.
68) Thick Fat Pokémon with this Trait receive half damage from Fire type and Ice type attacks.
69) Torrent When the HP of a Pokémon with this Trait falls below 1/3 it's total HP, that Pokémon's Water type attacks will do 1.5x damage.
70) Trace When a Pokémon with this Trait enters play, it copies the Trait of an opposing Pokémon until it leaves play.
71) Truant Pokémon with this Trait are extremely lazy, and cannot attack consecutively.
72) Vital Spirit Pokémon with this Trait are extremely alert and cannot fall Asleep.
73) Volt Absorb When a Pokémon with this Trait is attacked with an Electric type move, it will absorb the damage and recover a maximum of 1/4 its total HP.
74) Water Absorb When a Pokémon with this Trait is attacked with a Water type move, it will absorb the damage and recover a maximum of 1/4 its total HP.
75) Water Veil Pokémon with this Trait are surrounded by a shield of water that prevents Burns.
76) White Smoke Pokémon with this Trait are protected by a veil of smoke that negates the effects of all stat-lowering moves.
77) Wonder Guard Pokémon with this Trait are protected by a mystical barrier that negates damage from all attacks except those that are Super Effective against them.