Looking for an unstoppable defensive wall in Pokémon Legends Z-A? Aggron transforms from vulnerable Steel/Rock-type into pure Steel-type defensive titan through Mega Evolution. With a staggering 180 base Defense (230 when Mega Evolved!), this Hoenn heavyweight becomes one of the game’s most resilient tanks when properly built. Here’s your complete guide to maximizing Aggron’s potential through optimal moveset, nature selection, and strategic Mega Evolution timing.
Table of Contents
Pokémon Legends: Aggron Build Guide
| Build Component | Recommendation | How to Obtain |
|---|---|---|
| Best Nature | Impish (+Def, -Sp. Atk) | Impish Mint (Rogue Sector 1) |
| Core Move 1 | Heavy Slam | Level-up move |
| Core Move 2 | Iron Defense | Level-up move |
| Utility Move | Roar | Training Machine (TM) |
| Coverage Move | Rock Slide | Level-up move |
| Evolution Level | 42 (Lairon → Aggron) | Wild Zone 14 |
Optimal Moveset: Maximum Defensive Strategy
Aggron’s moveset emphasizes durability and weight-based offense rather than raw damage. This defensive focus transforms it into a battle endurance specialist.
Heavy Slam (Primary STAB Attack)
Your main offensive weapon leverages Aggron’s massive weight (793 lbs!) against lighter opponents. Heavy Slam’s damage calculation scales with the weight difference between you and your target—the lighter your opponent, the more devastating your attack. This makes Aggron particularly effective against speedy, fragile sweepers.
Why it works: Fast attackers like Weavile, Alakazam, and most Dragon-types weigh significantly less than Aggron, resulting in near-maximum damage output without requiring stat boosts.
Iron Defense (Setup Move)
With 180 base Defense already making Aggron incredibly bulky, Iron Defense pushes this to absurd levels. Two uses create a virtually unkillable physical wall that can stall out entire teams while accumulating residual damage through entry hazards.
Strategic usage: Set up Iron Defense early against physical attackers. After 2-3 boosts, even super-effective Fighting moves become manageable, especially when Mega Evolved.
Roar (Phasing Utility)
This Training Machine move provides crucial utility by forcing opponent switches. When facing setup sweepers trying to boost stats, Roar resets their progress entirely. Combined with entry hazards from teammates, this becomes a chip damage engine.
Tactical advantage: Aggressive opponents often stay in to challenge your bulk. Roar disrupts their strategy while accumulating damage through repeated forced switches onto hazards.
Rock Slide (Type Coverage)
Learned through level-up, Rock Slide provides Rock-type STAB coverage against Flying, Bug, Fire, and Ice opponents. The flinch chance (30%) adds disruption potential, occasionally preventing opponents from attacking at all.
Coverage note: While Rock-type moves share many weaknesses with Steel-type Aggron, the STAB bonus and neutral coverage make this essential for balanced offense.
For comprehensive TM locations and move tutor strategies, check our Pokémon Legends Z-A complete guide.
Best Nature: Impish for Maximum Bulk
Impish Nature (+Defense, -Special Attack) is absolutely mandatory for defensive Aggron builds. This nature sacrifices the already underwhelming 60 base Special Attack to push Defense even higher.
Where to Find Impish Mint: Head to Rogue Sector 1 and purchase the Impish Mint from the nature modification vendor. Apply it to your Aron, Lairon, or Aggron to permanently change its nature to Impish.
With Impish nature, base 180 Defense, and Iron Defense boosts, Aggron reaches physical defense levels that few Pokémon can match. Even super-effective physical hits become manageable, while neutral damage barely scratches the surface.
Catching Aggron: Wild Zone 14 Strategy
Find either Aron or Lairon in Wild Zone 14 during mid-to-late game progression. Both spawn semi-regularly, though Lairon appears at higher levels if you want to skip early evolution stages.
Evolution Path:
- Aron → Lairon (Level 32)
- Lairon → Aggron (Level 42)
Pro Tip: If you catch Lairon around level 38-40, you’ll only need a few battles before evolving into Aggron, saving significant training time.
Base vs. Mega Aggron: The Game-Changing Transformation
| Stat | Base Aggron | Mega Aggron | Change |
|---|---|---|---|
| HP | 70 | 70 | — |
| Attack | 110 | 140 | +30 |
| Defense | 180 | 230 | +50 |
| Sp. Attack | 60 | 60 | — |
| Sp. Defense | 60 | 80 | +20 |
| Speed | 50 | 50 | — |
| Type | Steel/Rock | Pure Steel | Critical |
Total Base Stats: 530 → 630 (+100)
The type change from Steel/Rock to pure Steel is revolutionary. Base Aggron suffers 4x weakness to Fighting and Ground moves—both common offensive types. Mega Evolution drops the Rock typing entirely, reducing these to standard 2x weaknesses while maintaining Steel’s excellent resistance profile.
Resistance Count:
- Base Aggron: 10 resistances, 7 weaknesses (including 2x 4x weaknesses)
- Mega Aggron: 10 resistances, only 3 weaknesses (all 2x)
This defensive typing improvement combined with +50 Defense creates one of the bulkiest Pokémon in competitive play.
For more Mega Evolution strategies and mechanics, explore our Pokémon Legends Z-A Numel & Camerupt guide.
Battle Strategy: Maximizing Tank Potential
Early Battle Setup:
- Send Aggron against physical attackers
- Use Iron Defense 1-2 times while taking hits
- Begin attacking with Heavy Slam once sufficiently bulky
- Roar out setup sweepers before they become threatening
Mega Evolution Timing: Don’t Mega Evolve immediately. Wait until facing Fighting or Ground-type threats where the typing change matters most. Against neutral opponents, save Mega Evolution for later turns when battles intensify.
Team Synergy: Pair Aggron with Special walls like Blissey or Umbreon to create balanced defensive cores. Aggron handles physical attackers while teammates manage special attackers. Entry hazard setters (Stealth Rock, Spikes) synergize perfectly with Roar strategies.
Type Matchup Awareness:
- Switch out against: Special attackers (low Special Defense), Ground-types, Fighting-types before Mega Evolving
- Stay in against: Physical attackers, Normal-types, Flying-types, Dragon-types
- Mega Evolve against: Fighting-types (removes 4x weakness), Ground-types (reduces to 2x)
For advanced battle tactics and team-building principles, visit our Drampa build guide featuring similar tanking strategies.
Why Aggron Excels in Legends Z-A
The combination of extreme physical bulk, weight-based offense, and Mega Evolution flexibility makes Aggron invaluable for both story progression and competitive play. While its low Speed prevents offensive sweeping, defensive stalling strategies remain highly effective throughout all game phases.
The pure Steel-type transformation through Mega Evolution addresses Aggron’s primary weakness, creating a nearly unkillable defensive pivot perfect for disruption-based team compositions. Combined with straightforward evolution requirements and accessible location in Wild Zone 14, Aggron offers elite defensive potential without excessive grinding.
Frequently Asked Questions
Q: Can Aggron survive super-effective Fighting moves even with high Defense?
Base Aggron’s 4x Fighting weakness makes survival difficult even with maxed Defense and Iron Defense boosts. However, Mega Aggron changes everything—the pure Steel typing reduces Fighting effectiveness to 2x weakness. With Impish nature, 230 base Defense, and Iron Defense boosts, Mega Aggron can actually tank neutral Fighting moves reasonably well. The key is timing your Mega Evolution correctly when facing Fighting-types. Against physical Fighting attackers specifically, 2-3 Iron Defense boosts before Mega Evolving creates enough bulk to survive even super-effective hits, though you’ll still take significant damage.
Q: Is Aggron worth using before obtaining its Mega Evolution?
Yes, but with caution. Base Aggron remains viable throughout the game thanks to its exceptional 180 base Defense and solid movepool. However, the Steel/Rock typing creates genuine problems—4x weaknesses to Fighting and Ground moves mean you’ll face frequent forced switches. Focus on using base Aggron against physical attackers that don’t carry Fighting or Ground coverage moves. Once you obtain Mega Evolution, Aggron’s viability skyrockets as the type change eliminates its most crippling weaknesses. Until then, treat Aggron as a specialized physical wall rather than a general-purpose tank, and always maintain counter-picks for Fighting-types in your team composition.
