Overview
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Mega Camerupt is a great Trick Room sweeper thanks to its ability, Sheer Force, high Special Attack, and abysmal Speed stat that makes it slower than Amoonguss. It does well against common threats to Trick Room teams, such as Amoonguss and certain Steel-types including Bisharp, Aegislash, and Escavalier, thanks to its typing and ability, which that let it severely damage or OHKO them with Heat Wave and/or Fire Blast. Mega Camerupt also has good offensive coverage with its STAB moves, with Heat Wave hitting the Bug- and Grass-types that resist Earth Power, and the latter Earth Power hitting the Rock- and Fire-types that resist Heat Wave the former. However, Mega Camerupt is weak to Ground- and Water-type attacks, two common types in Doubles OU, which also makes gives Mega Camerupt a bad match(remove space)up against rain. Mega Camerupt, straight up, can't touch Water-types. In the end, Mega Camerupt is the best Mega Evolution Trick Room sweeper, but it should only be used in Trick Room.
Trick Room Attacker
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name: Trick Room Attacker
move 1: Heat Wave
move 2: Earth Power
move 3: Fire Blast / Hidden Power Ice / Ancient Power
move 4: Protect
ability: Solid Rock
item: Cameruptite
evs: 248 HP / 252 SpA / 8 SpD
ivs: 0 Spe
nature: Quiet
Moves
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Heat Wave is a STAB attack that hits both foes and is boosted by Sheer Force. Earth Power is a secondary STAB attack that hits Rock- and Fire-types for super effective damage, providing great coverage alongside Heat Wave; thanks to Sheer Force, it will always OHKO Shuca Berry Heatran. The third slot is your choice; Fire Blast is an insanely powerful non-spread Fire-type STAB attack, as it OHKOes Landorus-T and hits Pokemon such as Latios for only a little less damage than Hidden Power Ice, which hits Dragon-types such as Latios and Hydreigon, while Ancient Power hits Mega Charizard Y, Volcarona, and Talonflame.
Set Details
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Maximum Special Attack EVs coupled with a Quiet nature and 0 Speed IVs make Mega Camerupt as powerful and as slow as possible. 248 HP EVs increase Mega Camerupt's overall bulk and minimizes residual damage.
Usage Tips
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Most of the time, Mega Camerupt should be spamming Heat Wave. Use Protect as Camerupt Mega Evolves and as a teammate sets up Trick Room. However, if it is already up, Mega Camerupt doesn't need to, (sorry, doesn't need to what ?__? Mega Evolve?) as normal Camerupt is still pretty slow. Mega Camerupt shouldn't always have to use Protect, however, because if it can safely attack the opponent's Pokemon it will be fine. Mega Camerupt should mostly be used under Trick Room, as its bulk is very valuable, so you shouldn't have it take hits unless you need it to. Use moves appropriately; despite the type advantage, a neutral Fire Blast or Earth Power will do more damage than a 2x super effective Hidden Power Ice or Ancient Power, a 2x resisted Fire Blast or Earth Power will do more damage than a neutral Hidden Power Ice or Ancient Power, etc.
Team Options
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Trick Room users such as Cresselia, Jellicent, and Gothitelle set up Trick Room for Mega Camerupt. Jellicent works especially well, as in it can switch into Water-type attacks thanks to Water Absorb, and Mega Camerupt checks Grass-types that threaten Jellicent, while Cresselia can utilize Sunny Day to boost the power of Mega Camerupt's Fire-type attacks. Amoonguss provides Rage Powder support, helping Mega Camerupt avoid Water-type attacks, and also functions well in Trick Room. Amoonguss, however, doesn't like getting burned from by Scald, which is often targeted at Mega Camerupt. Helping Hand users such as Cresselia let Mega Camerupt dish out immense damage. Choice Specs Sylveon exerts tons of offensive pressure to on the opponent in combination with Mega Camerupt, as Mega Camerupt threatens the Steel- and Poison-types that resist Sylveon's Hyper Voice, with its STAB moves.
Other Options
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Substitute can be used, as it protects Mega Camerupt from status such as Amoonguss's Spore; it also lets Mega Camerupt take advantage of switches and Protects from the foe. Rock Slide can be used for a spread attack that hits Mega Charizard Y, Volcarona, and Talonflame. Eruption can be used, but its power gets reduced over time, it is less reliable, and it isn't boosted by Sheer Force. Will-O-Wisp can be used to cripple physical attackers.
Checks & Counters
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**Typing Advantage**: Water-type Pokemon, such as Rotom-W, Gyarados, Suicune, and Mega Swampert, threaten Mega Camerupt with a STAB attack and can easily switch into a Heat Wave. Rotom-W and Gyarados in particular are immune to Earth Power. Azumarill has a 50% chance to OHKO Mega Camerupt with Aqua Jet. Ground-types such as Garchomp, Landorus-T, and Landorus beat Mega Camerupt with a STAB Earthquake, or in Landorus's case, Earth Power. However, they need to be aware of Hidden Power Ice. Fire Blast also OHKOes both Landorus formes, softening prediction. Pokemon that resist Fire and are immune to Ground include some Dragon-types such as Hydreigon, Latios, and Salamence, (remove comma) and some Fire-types such as Talonflame. However, Salamence must be aware of Hidden Power Ice, and Talonflame must be aware of Ancient Power.
**Opposing Weather**: Rain weakens Mega Camerupt's Fire-type attacks. Water-type rain abusers such as Ludicolo beat Mega Camerupt, OHKOing it with Hydro Pump. Ludicolo can switch into Earth Power, and since because rain weakens Heat Wave and Fire Blast, it can switch into those too. Politoed is a good examples of this, easily OHKOing Mega Camerupt with Scald and can being able to switch into Heat Wave.
**Trick Room Counters**: Mega Camerupt is completely reliant on Trick Room to do its job. Pokemon with Taunt can help prevent Trick Room, and even Pokemon with their own Trick Room can prevent it by resetting it. Pokemon that are able to KO your Mega Camerupt's (imo we should keep the POV of the Checks & Counters section kinda neutral? because people that want to counter Camerupt also read this page, not just Camerupt users. idk, up to you) Trick Room setter(s) are problematic. Pokemon such as Mega Gengar and Bisharp have the type advantage against most Trick Room setters and have the power to beat them. Thundurus can utilize Taunt, but it isn't strong enough to beat common Trick Room setters such as Cresselia.