So, I wrote a blog about a year ago where I talked about the Top Ten Best Pokemon Abilities. So now I have to make the Top Ten Worst Pokemon Abilities.

The abilities are based on their value in Competitive Play and are based on Gen V .

Here we go:

Heavy Metal doubles the weight of the Pokemon that has the ability. This is mainly a negative ability as you would take twice as much damage from Grass Knot and other weight based moves.

However,Heavy Metal is only a Hidden Ability so it is improbable you would get a Pokemon that has this ability.

Pokemon with Heavy Metal: Some with Hidden Ability

Weak Armor Raises Speed but lowers Defense by one level each upon being hit by an attack.

Lowering one of your stats upon each attack you take could be devastating.Anytime you lower a stat , you are weakened and that could lose you a battle.

Pokemon with Weak Armor: Garbodor,others by Hidden Ability

Illuminate raises the chance you run into a wild Pokemon.

It has no effect in battle,has a negative effect outside of battle and is especially annoying in areas such as caves or seas where wild Pokemon are already running rampant.

Pokemon with Illuminate: Staryu, Starmie, Chinchou, Lopunny

A Pokemon with Klutz is unable to hold items.

This defeats a lot of the strategy of Pokemon. A Pokemon with Klutz can't raise his stats or heal himself using held items.The Pokemon with Klutz will be severely limited in Competitive Battling due to this.

Pokemon with Klutz: Buneary, Lopunny, Audino.

Normalize makes all of a Pokemon's attacks automatically Normal type.

Like Klutz,a Pokemon with this ability is severely hindered in battle as Normal moves aren't super effective against any type and don't affect Ghost type Pokemon.

Pokemon with Normalize: Skitty, Delecatty

Stall makes your Pokemon always move last.

This shouldn't even need any explanation, this ability makes sweepers impossible and means you can be taken out quickly.

Pokemon with Stall: Sableye

Run Away makes it easier for you to flee from your opponent. This is useless as you cannot flee from a Competitive Battle.

Pokemon with Run Away: Rattata, Raticate, Dodrio, Lillipup, Herdier...

Slow Start temporarily cuts Attack and Speed Stats in half for the first five turns of a Pokemon Battle.

This means that for five turns you are in a severly weakened position. Your opponent could use your Slow Start to quickly knock you off.

Pokemon with Slow Start: Regigigas

A Pokemon with the Truant ability can only attack every other turn.

This is pretty much like giving your opponent a free shot at killing you. Your opponent can attack twice in a row ! This is a crippling ability you shouldn't want any of your Pokemon to have.

Pokemon with Truant: Slaking

A Pokemon with the Defeatist ability has its Attack and Special Attacked halved when its health is below 50%.

Usually an ability that lowers stats usually raises another.  However, Defeatist not only doesn't raise a stat but lowers two stats. If you have a Pokemon with Defeatist, you are pretty much done when your health is below 50%.

Pokemon with Defeatist: Archen, Archeops