Stats, EVs, and Natures
Every Pokémon in competitive VGC has six stats: HP, Attack, Defense, Special Attack, Special Defense, and Speed. Your Pokémon's final stat values are determined by four factors: the species' base stats (fixed), Individual Values or IVs (ideally 31 in most stats), Effort Values or EVs (up to 252 per stat, 510 total), and the Pokémon's nature (one stat boosted by 10%, one reduced by 10%).
Understanding how these factors interact lets you customize your Pokémon for specific roles. A physical attacker wants maximum Attack and Speed, a bulky support wants HP and defenses, and a Trick Room sweeper wants minimum Speed with maximum offenses. The EV spread and nature are the primary tools for this optimization.
The Stat Formula
At level 50 (the standard VGC level), the stat formula works as follows. For HP: floor((2 × Base + IV + floor(EV / 4)) × 50 / 100) + 50 + 10. For all other stats: (floor((2 × Base + IV + floor(EV / 4)) × 50 / 100) + 5) × NatureModifier, where NatureModifier is 1.1 for the boosted stat, 0.9 for the reduced stat, and 1.0 for neutral stats.
The practical implication is that every 4 EVs adds 1 point to a stat at level 50. Since you have 510 total EVs, you can fully maximize two stats (252 each) with 6 left over for a third stat, or spread EVs across multiple stats for a more balanced build. The first 4 EVs in a stat always add 1 point, so even small investments are meaningful.
Choosing Natures
Natures boost one stat by 10% and reduce another by 10%. Five natures are neutral (Hardy, Docile, Bashful, Quirky, Serious) and provide no benefit, so they are rarely used competitively. The optimal nature depends on the Pokémon's role.
For physical attackers: Adamant (+Atk / −SpA) if you need maximum power, or Jolly (+Spe / −SpA) if you need to outspeed specific threats. For special attackers: Modest (+SpA / −Atk) or Timid (+Spe / −Atk). For Trick Room attackers: Brave (+Atk / −Spe) or Quiet (+SpA / −Spe) to minimize Speed. For defensive Pokémon: Bold (+Def / −Atk), Calm (+SpD / −Atk), Impish (+Def / −SpA), or Careful (+SpD / −SpA).
Always reduce the stat your Pokémon does not use. A physical attacker should reduce Special Attack, and a special attacker should reduce Attack. This is free optimization with no downside.
Common VGC EV Spreads
Maximum Offense (252/252/4)
The simplest spread: 252 EVs in the primary offensive stat, 252 in Speed, and 4 in HP (or a defensive stat). This maximizes damage output and Speed, ideal for glass cannons and sweepers that need to hit as hard and fast as possible. Examples: 252 Atk / 252 Spe Jolly on physical sweepers, 252 SpA / 252 Spe Timid on special sweepers.
Bulky Offense
Splits EVs between offense, Speed, and bulk. For example, 252 HP / 252 SpA / 4 SpD Modest on a Pokémon that does not need maximum Speed but wants to survive more hits. This is common on Pokémon under Trick Room or Tailwind, where external speed control compensates for lower Speed investment.
Defensive Spreads
Support Pokémon often run 252 HP / 252 Def (or SpD) / 4 of the other defense. The goal is to maximize survivability so the Pokémon can execute its support role (setting Trick Room, using Intimidate, providing redirection) for as long as possible. Some support Pokémon use split defensive spreads like 252 HP / 128 Def / 128 SpD to handle both physical and special attacks.
Speed Creep and Benchmarks
Speed creep is the practice of investing just enough Speed EVs to outpace a specific benchmark, then putting the remaining EVs into bulk. For example, instead of running 252 Speed on a Pokémon, you might run 196 Speed to outpace a specific common threat, then invest the saved 56 EVs into HP or Defense.
This technique requires knowing the metagame: which Pokémon you will commonly face and what Speed they typically run. Common benchmarks include outspeeding specific base Speed tiers (like base 100, base 110, base 130), outspeeding other creep spreads, or hitting specific numbers under Tailwind or Trick Room.
Trick Room Spreads
Trick Room attackers want minimum Speed: 0 Speed IVs, 0 Speed EVs, and a Speed-reducing nature (Brave for physical, Quiet for special). This ensures they move first under Trick Room. The freed-up EVs and nature go entirely into offense and bulk.
Trick Room setters themselves need to survive long enough to use the move. They typically run maximum HP and one defense, with the remaining EVs in the other defense. Speed is less important on the setter since Trick Room has negative priority anyway.
Practical EV Tips
Invest in even numbers of 4 — putting 1, 2, or 3 EVs in a stat is wasted because the formula floors the division by 4. Always invest in multiples of 4 (4, 8, 12... up to 252).
HP investment is often more efficient than defensive investment because HP helps against both physical and special attacks. However, there are diminishing returns: once HP is very high, investing in a specific defense provides more effective bulk against that damage type.
Use a damage calculator (like Stratagem's built-in QuickCalc) to test specific EV spreads against common threats. The goal is to find the minimum investment needed to survive key attacks, then invest the rest elsewhere.