PokemonHQ Rules

PokemonHQ Tournament Rules & Regulations
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1. Your team must be verified for UU.
2. No Ubers.
3. No Legendaries.
4. Must beat, or play against 2-3 other players minimum .
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Getting Champion Belt
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1. You have to beat 2 members of the Elite 4 (including main owners).
2. You may ask to in any format you wish,but the Elite 4 member will choose the format.
3. You may ask the Elite 4 member to use legendaries.
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Belts:
Champion Belt: Gold Belt
1st Place Tournament Belt: Ruby Red Belt
2nd Place Tournament Belt: Sapphire Blue Belt
3rd Place Tournament Belt: Emerald Green Belt

As commonly defined, a "standard" battle allows any Pokémon not listed in the Uber tier. Tiers are 'exclusive' in only one direction; for instance, in a UU battle, Pokémon from tiers above UU (BL, OU, or Uber) are banned, but Pokémon from lower tiers (such as RU or NU) are allowed.

Extra Advice:

Uber

The Uber tier is effectively a banlist for the OU tier, as "standard" battles include everything in the OU list and below. Pokémon in the Uber tier were deemed too powerful or destabilizing to the OU metagame to allow. Ubers, if allowed, cause extreme "centralization" of strategies—in other words, it is impossible or very difficult to counter them in a reasonable manner.
The Uber tier may include any Pokémon, not necessarily just Legendary Pokémon. Typically, it includes all Legendary game mascots except Black Kyurem, due to various factors preventing it from becoming "too centralizing". Although many legendary Pokémon reside in the Uber tier, a far larger number exists in lower tiers due to similar inadequacies.
After the release of Pokémon Omega Ruby and Alpha Sapphire, due to the dominance of Mega Rayquaza, Smogon made their version of Ubers a full-fledged tier, allowing bans from the tier. However, unlike other tiers, it is not affected by usage. As a result, Smogon also endorses a playstyle referred to as "Anything Goes", which has no fan-imposed rules other than the "Endless Battle Clause".

Overused

Overused, commonly abbreviated as "OU", refers to Pokémon that are most frequently used in standard play.
OU status does not have to do with a Pokémon's power or ability. The Pokémon that make up OU, as with all tiers, are determined based on usage. A Pokémon's tier may change from generation to generation. For instance, Magneton is often considered OU in Generation III because of its advantage over Skarmory, another commonly used Pokémon. In Generation IV, Magnezone, the evolution of Magneton, took Magneton's role in OU in some tier lists due to its generally higher base stats. If an OU Pokémon is not used enough in the OU tier, it will fall to the UU tier.

Borderline

Pokémon in Borderline, commonly referred to as "BL", are "too strong" for Underused, but are not sufficiently used in Overused battles. In essence, BL serves a ban list for Underused.

Underused

Underused, commonly referred to as "UU", consists of Pokémon that are not used enough to be in OU. Pokémon classified as UU are often outclassed by Pokémon in higher tiers, possibly as a result of generally lower base stats, available moves, or Abilities. For example, in Generation V, Machamp fell to UU in some tier lists largely as a result of the introduction of Conkeldurr, which has Mach Punch, Drain Punch, and generally superior base stats. UU Pokémon are commonly used in OU battles, but most have smaller niches. If a UU Pokémon is not used enough in the UU tier, it will fall to the RU/LU tier.

Borderline 2

Pokémon in Borderline 2, commonly referred to as "BL2", are "too strong" for Rarelyused/Littleused, but are not sufficiently used in Underused battles. In essence, BL2 serves a ban list for Rarelyused/Littleused.

Rarelyused/Littleused

This tier is referred to as either "RU" or "LU". While the name of the tier varies, its "level" is equivalent. The tier consists of Pokémon that are not used enough to be in UU. For example, Escavalier is considered RU in Generation V in some tier lists because it is not used enough in UU battles. If an RU/LU Pokémon is not used enough in the RU/LU tier, it will fall to the NU tier.

Borderline 3

Pokémon in Borderline 3, commonly referred to as "BL3", are "too strong" for Neverused, but are not sufficiently used in Rarelyused/Littleused. In essence, BL3 serves a ban list for Neverused.

Neverused

Neverused, commonly referred to as "NU", consists of Pokémon that are not used enough to be in RU/LU. The name is not literal, stemming from the tiers of Generation I, where Neverused Pokémon had generally lower "competitive value" in comparison to other Pokémon. Some Pokémon that are pre-evolutions of Pokémon in higher tiers may be classified as NU.

Borderline 4

Pokémon in Borderline 4, commonly referred to as "BL4", are "too strong" for PU, but are not sufficiently used in Neverused. In essence, BL4 serves a ban list for PU.

PU

PU (which doesn't stand for anything, instead referencing the exclamation of disgust) is a tier below Neverused in Smogon's tier list (other tier lists do not have a tier this low) which consists of Pokémon that are not used enough to be in NU.

Not Fully Evolved

This group is more commonly known as "NFE", and as the name implies, contains most Pokémon that have not yet reached their final evolution stage and do not have a high enough usage to appear in any tier. This group is not actually a tier, but rather a collection of Pokémon without significant usage even in the lowest tier.

Little Cup

Main article: Little Cup
Little Cup is an entirely separate battle style where only the Pokémon that are the lowest evolutionary stage in their family are allowed, like Bulbasaur and Mienfoo. Pokémon that do not evolve at all, such as Luvdisc, are not allowed in the tier. The moves Sonic Boom and Dragon Rage are also prohibited. All Pokémon must be level 5 or lower to compete.
This tier is based on the Stadium Cup.
Some unevolved Pokémon—for example, Meditite, Scyther and Gligar—are sometimes considered too powerful and banned in some tier lists. In this special battle style, Berry Juice is also sometimes banned.
Tier variations

Some Pokémon are listed in tiers but are sometimes used in competitive play outside of their own tier because they have a change during evolution that modified their disposition enough to allow them to stay competitive, even some in an unevolved state.
Porygon2, which is due to its evolution, Porygon-Z, having lower Defense and Special Defense, meaning Porygon2 can be used as a wall, unlike its evolution.
Pikachu holding Light Ball can have higher Attack and Special Attack than its evolution, Raichu.
Magneton, as previously stated, is still used in lower tiers because it carries the ability to trap Steel types with Magnet Pull. It also has use in OU battles, as its slightly higher speed than Magnezone allows it to outspeed many OU Pokémon that Magnezone cannot.
Eviolite, an item that multiplies both Defense and Special Defense of not-fully-evolved Pokémon by 1.5, has increased the popularity of several other pre-evolutions, such as Gligar, Dusclops, and Chansey, among others, Dusclops and Chansey even being in a higher tier than their evolutions, Dusknoir and Blissey, respectively, on some tier lists.