
Mega Camerupt is a great Trick Room attacker thanks to a combination of high Special Attack, an excellent ability in Sheer Force, and stupendous Speed that allows it to underspeed and KO Amoonguss, a Pokemon that Trick Room teams have problems dealing with, Furthermore, other Trick Room team counters such as Ferrothorn, Aegislash, and Tyranitar are also checked by Mega Camerupt. Mega Camerupt's Fire / Ground STAB combination has good neutral coverage. This is complemented by the introduction of Guardian Deities that grant Mega Camerupt powerful coverage moves from Nature Power, enabling it to OHKO Dragon- and Water-types, which normally pose a problem to Mega Camerupt, if the right Terrain is up. However, Mega Camerupt is far less threatening outside Trick Room and requires heavy support from other Pokemon on its team. Furthermore, Mega Camerupt is weak to common Ground- and Water-types, and it is also weak to rain.
[SET]
name: Trick Room Attacker
move 1: Heat Wave
move 2: Earth Power
move 3: Nature Power / Fire Blast / Substitute
move 4: Protect
item: Cameruptite
ability: Solid Rock
nature: Quiet
evs: 248 HP / 8 Def / 252 SpA
ivs: 0 Spe
[SET COMMENTS]
Moves
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Heat Wave is Mega Camerupt's main STAB attack, which, when boosted by Sheer Force, deals massive spread damage to both foes. Earth Power is also boosted by Sheer Force and has good coverage with Heat Wave. Nature Power turns into a Sheer Force-boosted coverage move depending on the active Terrain. The most helpful options are Energy Ball, from Grassy Terrain, and Moonblast, from Misty Terrain, which help Mega Camerupt deal with Tapu Fini and Mega Salamence, respectively, which would otherwise give it trouble. Fire Blast can be used as a single-target Fire-type STAB attack that helps Mega Camerupt get around Wide Guard from the likes of Celesteela and gives it a way to OHKO Landorus-T. Alternatively, Substitute can be used to take advantage of free turns gained by foes trying to stall out Trick Room and the occasional switch-in. Protect scouts for the foe's move, lets an ally deal with threats or set Trick Room, and stalls out field effects.
Set Details
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Maximum Special Attack investment is encouraged so Mega Camerupt can hit as hard as possible. The investment in bulk let Mega Camerupt take an Earthquake from Adamant Landorus-T after the spread reduction. 0 IVs and a Quiet nature minimize Mega Camerupt's Speed, allowing it to underspeed everything in Trick Room, including Amoonguss. Solid Rock is the best ability before Mega Evolution, letting Camerupt take less damage from super effective hits on the switch.
Usage Tips
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Using Trick Room is a near-requirement for Mega Camerupt, as it bulk is very valuable and it will put more pressure on the opposing team with Trick Room active. If Trick Room isn't up, the safest way you can ensure it is set safely is to use Protect and let Mega Camerupt's ally set it up. Once Mega Camerupt is in play, the goal is to use Heat Wave as many times as possible before Mega Camerupt is forced out, as Sheer Force-boosted Heat Wave takes large chunks of HP out of both opposing Pokemon, assuming they do not resist it. Mega Camerupt forces a lot of switches; your opponent will likely switch in a bulky Water-type if they have the opportunity to, and if they're expecting you to use Earth Power, they will probably consider switching in a Flying-type or a Pokemon with Levitate. Substitute is best used when Mega Camerupt forces a switch and on the the last turn of Trick Room, when foes are more likely to use Protect to stall it out, thus reducing their reliance on prediction. For sets using Nature Power, you're most likely to get value out of Grassy and Electric Terrain, as these allow you to counter opposing Water-types. Try to keep Tapu Bulu or Tapu Koko in the back so you can switch them in once a bulky Water-type like Tapu Fini is on the field.
Team Options
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Trick Room setters are necessary for Mega Camerupt to take advantage of its low Speed. Having a bulky option like Bronzong, Porygon2, or Cresselia as an ally is crucial, since the priority of Mega Camerupt teams is getting Trick Room set regardless of the opponent's attempts to stop it, and Mega Camerupt is absolute deadweight if Trick Room can't be set.Pokemon that struggle with Steel-types such as Tapu Bulu and Diancie benefit from Mega Camerupt's presence. Tapu Bulu is the ideal Island Guardian for Mega Camerupt's team because it forces out Water-types and summons Grassy Terrain, which converts Nature Power to Energy Ball, halves Earthquake damage, and provides recovery to Substitute variants of Mega Camerupt. Tapu Fini is also a worthwile partner that can provide Heal Pulse recovery and extra defense against Amoonguss's Spore. An Amoonguss of your own is able to redirect Hydro Pump or Waterfall for Mega Camerupt and threaten the opposing team with Spore.
[STRATEGY COMMENTS]
Other Options
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Eruption is an option to hit harder than Heat Wave, but it's not boosted by Sheer Force and deals inconsistent damage. Flamethrower is an alternative to Fire Blast for a more accurate single-target move. Hidden Power Ice allows Mega Camerupt to OHKO Mega Salamence, Zygarde, and Landorus-T. Ancient Power or Rock Slide is a niche option to hit Mega Charizard Y and Volcarona; the latter is better, since it hits them on their weaker Defense.
Checks and Counters
===================
**Water-types**: Bulky Water-types like Tapu Fini and Milotic can OHKO Mega Camerupt with their STAB moves with little Special Attack investment. Rain attackers such as Kingdra, Ludicolo, and Swampert can easily switch into Heat Wave and threaten Mega Camerupt with their rain-boosted STAB attacks. Politoed and Pelipper can switch in to weaken Mega Camerupt's Fire-type STAB attacks with Drizzle while also OHKOing it with their STAB moves, and Pelipper is also immune to Earth Power.
**Ground-types**: Zygarde and Landorus-T are able to beat Mega Camerupt with Thousand Arrows and Earthquake, respectively. Furthermore, Zygarde's typing allows it to resist Fire-type moves and get free setup turns, though Landorus-T can be OHKOed by Fire Blast.
**Faster Attackers**: Mega Camerupt is the epitome of a Pokemon that struggles against faster attackers; almost everything outspeeds it and damages it if Trick Room isn't set.
**Opposing Weather**: Mega Camerupt's Fire-type attacks are weakened by rain, reducing its offensive presence heavily.
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