Shield Dust: Change Tier
Same reasons as alexwolf's. Bye hax barring critical hits, Charge Beam boost, recoil , freeze and 100% secondary effects like Fake Out.
It's like having Inner Focus and Magma Armor at the same time besides more beneficial effects.
Klutz: Change Tier:
Because:
B Tier- Abilities that are good but not as good as A Tier abilities either because they require a more customized movepool and stat spread to be effective, are more specialized in purpose or effect, or are have affects that are just flat out inferior to the affects of A or S Tier Abilities
However, this ability could be hindering if it is the only ability of the Pokemon, it is a strange case.
Normalize: Change Tier
Aside of paralyzing Grounds with Thunder Wave and using Ice Beam/Thunderbolt/the like.. like a normal special STAB but being walled by Rocks, Steels and Ghosts, not much useful.D Tier, this ability is awful.If at least could poison Poison and Steel Pokemon...
Rain Dish: Change Tier
This is a special case, without Drizzle in the tier, it is D Tier, considering rain, B Tier, because in this thread we are considering that the Pokemon has the movepool/stats... to make profit of the ability.
Ice Body: Change Tier
Well, Hail is a hindering weather to the majority of Pokemon, but the owner of this ability could heal itself while the foe is receiving hail damage. Sure in the current OU metagame Rain Dish is better because even not using weather, statistically Rain Teams are a lot more common and it is easy to take the foe's weather in its profit but, thinking if Hail was the only weather in X tier, in this could be useful(Regice in DW NU if Snow Warning is allowed, for example)
Defiant: Do Not Change Tier.
An ability only useful against Intimidate and Seed Flare most of the time and they are not that commonand moves like 20% to lower something and not reliable even that.Intimidators are not going to appear against to provide a +1 boost and Intimidate only activates once, so it is impossible to use it to activate the ability, bar maybe in the case of double switch.
C Tier, because statistically is more useful than a lot of abilities in D Tier.
Effect Spore: Change Tier
B Tier, considering that the user is not slow and cannot learn Sleep moves, like Parasect in the 3rd gen, going to Spore a foe and Effect Spore poisons it before.
Reckless: Change Tier
B Tier.
Rock Head: Change Tier
B Tier.
Hustle: Change Tier
Same reasons as alexwolf's.
Snow Cloak: Change Tier
Hail is a viable weather as Sandstream is so, to the same tier.
Suction Cups: Change Tier
Same reasons as alexwolf's.
Unburden: Change Tier
Same reasons as alexwolf's.
Wonder Skin: Change Tier
Same reasons as alexwolf's.
Vital Spirit: Change Tier
Tier above. This is always useful, except in the case the least useless Pokemon of the team has it and it is wanted to put it to sleep.
Insomnia: Change Tier
Tier above too.