Arceus is too powerful? I don't think so...Even with 17 formes and each one has multiple sets, countering fully EVed Arceus isn't as hard as you might think.
NOTE: I don't like using Arceus but I am posting this so you can know how to deal with that phat horse.
Arceus Introduction: Base 120 in every single stat, plus a ton of moves to choose from, Arceus can do basically anything? I doubt it. Arceus can become any type in the game as long as it holds the right plate. However, there are only 3 different kinds of Arceus that you should prepare for. Every set has it's own counters, and I will try to list all the possible counters.
For those of you who are still hiding in caves (quoted from Vulcan Fury), this thread will show you how to deal with Arceus.
Bug Arceus:
Calm Mind: Blissey, Chansey, Heatran, Ho-Oh, Reshiram, Giratina, Dialga(with Toxic), Skarmory*(watchout for Fire-type moves! Skarmory can Toxic, Spikes or Whirlwind it out.)Scarf Terrakion
Swords Dance: Giratina, Groudon, Lugia, Skarmory, Ho-Oh, Giratina-O(with Will-O-Wisp)Scarf Terrakion, Reshiram
Dark Arceus
Mono Attacker: Snatch Chansey and Blissey, Ho-Oh, Ferrothorn, Heatran, Heracross, Bulk Up Dialga, Kyogre*(Kyogre lacks recovery and needs Calm Mind Rest to beat Arceus), Scizor, Skarmory* ( Skarmory can't kill Dark Arceus but can Toxic and phaze it out), Tyranitar, Terrakion
Calm Mind: Blissey, Chansey, Kyogre, Ho-Oh, Scizor, Heracross, Scarf Terrakion
Dragon Arceus
Calm Mind: Blissey, Dialga*(needs Specs or Scarf), Heatran*(without Earth Power), Ho-Oh, Ferrothorn(without Fire-type attacks), Zekrom*(Scarf only and can't switch in)
Swords Dance: Bronzong, Groudon*, Lugia*, Skarmory, Zekrom*(Scarf), Palkia*(Scarf), Dialga*(Scarf), Ferrothorn*(physically defensive)
Electric Arceus
Calm Mind: Blissey, Chansey, Dialga (Bulk Up), Garchomp* (without Ice Beam), Groudon*(watchout for Ice Beam or Grass Knot), Gastrodon, Reshiram(Specs), Excadrill
Fighting Arceus
Calm Mind: Blissey, Chansey, Ho-Oh, Lugia*(hates Ice Beam), Rayquaza*(no Ice Beam), Mewtwo, Shaymin-S (without Ice Beam), Kyogre*
Swords Dance: Cresselia, Groudon, Giratina, Giratina-O, Ho-Oh*(watchout for Stone Edge), Lugia, Shaymin-S* (Fighting Arceus's physical STAB attack sucks)
Fire Arceus
Calm Mind: Chansey, Blissey, Ho-Oh, Kyogre, Gastrodon, Terrakion, Tyranitar, Zekrom(Scarf)
Flying Arceus
Calm Mind: Chansey, Blissey, Dialga, Ho-Oh, Heatran, Jirachi, Kyogre, Lugia, Tyranitar
Ghost Arceus
Calm Mind: Blissey, Chansey, Darkrai*, Dialga* (cannot stop Focus Blast variants), Heatran*(watch out for Focus Blast!), Ho-Oh, Togekiss, Scizor
Swords Dance: Groudon, Skarmory, Lugia* + Chansey* / Blissey* ( Shadow Force variants), Ferrothorn(physically defensive), Scizor*(needs Toxic and Defense investment), Kyogre*(Scarf or Bulky)
Defensive: Ho-Oh, Chansey, Blissey, Skarmory, Reshiram, Kyogre
Grass Arceus
Calm Mind: Blissey, Chansey, Dialga (needs Toxic or Bulk Up) Ho-Oh, Lugia, Skarmory* (without Flamethrower), Ferrothorn with Toxic, Reshiram, Heatran
Ground Arceus
Calm Mind: Blissey, Bronzong(With Toxic), Chansey, Ho-Oh, Cresselia(needs Toxic), Lugia, Kyogre, Shaymin-S, Skarmory(Toxic)
Swords Dance: Cresselia, Ferrothorn(physically defensive and has Power Whip), Lugia*(watch out for boosted Stone Edge if Stealth Rock is out), Kyogre* (needs Choice Scarf or physically defensive), Giratina, Giratina-O, Gliscor, Shaymin-S, Skarmory
Ice Arceus
Calm Mind: Blissey, Chansey, Heatran* (without Earth Power or Focus Blast), Heracross(Choice Scarf), Ho-Oh, Metagross* (without Earth Power), Jirachi* (without Earth Power), Scizor*(Fire Blast will kill), Terrakion(Choice Scarf), Tyranitar*(without Focus Blast)
Normal Arceus
Swords Dance: Giratina, Groudon, Ferrothorn(physically defensive), Lugia, Skarmory* (without Overheat), Terrakion(Scarf)
Defensive: Heatran, Ho-Oh, Reshiram, Lugia, Chansey, Blissey, Heracross, Giratina, Terrakion(Choice Band), Mewtwo, Darkrai, Kyogre
Poison Arceus
Calm Mind: Mewtwo, Excadrill, Gastrodon, Garchomp*(Scarf), Groudon*, Ho-Oh, Heatran* (without Earth Power), Skarmory* (without a Fire-type move), Giratina(Calm Mind), Metagross*(without Earth Power), Dialga(Bulk Up, and hates Earth Power)
Psychic Arceus
Calm Mind: Lugia, Metagross, Jirachi, Scizor, Heracross(Scarf)
Rock Arceus
Mono Attacker: Blissey, Chansey, Dialga*(Bulk Up), Garchomp, Groudon, Kyogre, Gastrodon, Palkia*(without sand), Ferrothorn, Excadrill, Metagross, Scizor*(can only revenge weakened ones), Terrakion, Heracross, Jirachi. NOTE: All of the physical attacker bar Heracross has to be wary of Will-O-Wisp.
Calm Mind: Blissey, Chansey, Dialga*(Bulk Up or use Toxic), Garchomp*( beware of Will-O-Wisps or Ice Beam), Groudon*(watch out for Will-O-Wisp), Kyogre, Gastrodon, Palkia*(without sand), Ferrothorn*(hates burn and dies to Fire-type attacks), Excadrill*(only in sand and hates burn or Fire-type moves), Metagross(without Will-O-Wisp and non-Fire-type attack variants only, Scizor*(can only revenge weakened ones), Terrakion(don't get burned!), Heracross, Jirachi*(Fire Blast kills)
Swords Dance: Bronzong, Groudon, Giratina, Ferrothorn, Kyogre*(Scarf or physically defensive)
Support: Chansey, Blissey, Dialga(with Toxic), Kyogre, Heracross, Gastrodon, Excadrill(only in sand), Giratina*(will end in a stall war unless Giratina has Toxic)
Steel Arceus
Calm Mind: Garchomp*(Scarf and cannot OHKO Arceus), Groudon(hates burn), Heatran, Ho-Oh, Heracross, Gastrodon, Kyogre(Calm Mind), Terrakion(Scarf), Reshiram, Zekrom*(stops Arceus without Will-O-Wisps only)
Swords Dance: Ho-Oh, Groudon, Garchomp(Scarf), Kyogre, Lugia*(can't hurt Arceys back but phaze), Ferrothorn*(can't immediately threaten Arceus), Giratina, Skarmory*(can only phaze or set up Spikes), Terrakion(Scarf)
Water Arceus
Calm Mind: Chansey, Blissey, Ferrothorn, Kyogre* (needs Calm Mind and Thunder), Palkia*(Choice Specs), Dialga*(Bulk Up or Toxic), Gastrodon, Zekrom(Scarf)
Swords Dance: Dialga*(without Earthquake), Groudon, Giratina, Lugia*(hates rain-boosted +2 Waterfall), Ferrothorn, Zekrom(Scarf), Kyogre*(needs Thunder to KO or use Roar to phaze)
Support: Kyogre, Lugia, Chansey, Blissey, Ferrothorn* (watchout for burn), Zekrom(Choice Scarf), Dialga, Giratina(Calm Mind or win with a stall war)
To make things better, I made a poll so you can vote for it! Anyone can vote for multiple choices.
NOTE: I don't like using Arceus but I am posting this so you can know how to deal with that phat horse.
For those of you who are still hiding in caves (quoted from Vulcan Fury), this thread will show you how to deal with Arceus.
Bug Arceus:
Calm Mind: Blissey, Chansey, Heatran, Ho-Oh, Reshiram, Giratina, Dialga(with Toxic), Skarmory*(watchout for Fire-type moves! Skarmory can Toxic, Spikes or Whirlwind it out.)Scarf Terrakion
Swords Dance: Giratina, Groudon, Lugia, Skarmory, Ho-Oh, Giratina-O(with Will-O-Wisp)Scarf Terrakion, Reshiram
Dark Arceus
Mono Attacker: Snatch Chansey and Blissey, Ho-Oh, Ferrothorn, Heatran, Heracross, Bulk Up Dialga, Kyogre*(Kyogre lacks recovery and needs Calm Mind Rest to beat Arceus), Scizor, Skarmory* ( Skarmory can't kill Dark Arceus but can Toxic and phaze it out), Tyranitar, Terrakion
Calm Mind: Blissey, Chansey, Kyogre, Ho-Oh, Scizor, Heracross, Scarf Terrakion
Dragon Arceus
Calm Mind: Blissey, Dialga*(needs Specs or Scarf), Heatran*(without Earth Power), Ho-Oh, Ferrothorn(without Fire-type attacks), Zekrom*(Scarf only and can't switch in)
Swords Dance: Bronzong, Groudon*, Lugia*, Skarmory, Zekrom*(Scarf), Palkia*(Scarf), Dialga*(Scarf), Ferrothorn*(physically defensive)
Electric Arceus
Calm Mind: Blissey, Chansey, Dialga (Bulk Up), Garchomp* (without Ice Beam), Groudon*(watchout for Ice Beam or Grass Knot), Gastrodon, Reshiram(Specs), Excadrill
Fighting Arceus
Calm Mind: Blissey, Chansey, Ho-Oh, Lugia*(hates Ice Beam), Rayquaza*(no Ice Beam), Mewtwo, Shaymin-S (without Ice Beam), Kyogre*
Swords Dance: Cresselia, Groudon, Giratina, Giratina-O, Ho-Oh*(watchout for Stone Edge), Lugia, Shaymin-S* (Fighting Arceus's physical STAB attack sucks)
Fire Arceus
Calm Mind: Chansey, Blissey, Ho-Oh, Kyogre, Gastrodon, Terrakion, Tyranitar, Zekrom(Scarf)
Flying Arceus
Calm Mind: Chansey, Blissey, Dialga, Ho-Oh, Heatran, Jirachi, Kyogre, Lugia, Tyranitar
Ghost Arceus
Calm Mind: Blissey, Chansey, Darkrai*, Dialga* (cannot stop Focus Blast variants), Heatran*(watch out for Focus Blast!), Ho-Oh, Togekiss, Scizor
Swords Dance: Groudon, Skarmory, Lugia* + Chansey* / Blissey* ( Shadow Force variants), Ferrothorn(physically defensive), Scizor*(needs Toxic and Defense investment), Kyogre*(Scarf or Bulky)
Defensive: Ho-Oh, Chansey, Blissey, Skarmory, Reshiram, Kyogre
Grass Arceus
Calm Mind: Blissey, Chansey, Dialga (needs Toxic or Bulk Up) Ho-Oh, Lugia, Skarmory* (without Flamethrower), Ferrothorn with Toxic, Reshiram, Heatran
Ground Arceus
Calm Mind: Blissey, Bronzong(With Toxic), Chansey, Ho-Oh, Cresselia(needs Toxic), Lugia, Kyogre, Shaymin-S, Skarmory(Toxic)
Swords Dance: Cresselia, Ferrothorn(physically defensive and has Power Whip), Lugia*(watch out for boosted Stone Edge if Stealth Rock is out), Kyogre* (needs Choice Scarf or physically defensive), Giratina, Giratina-O, Gliscor, Shaymin-S, Skarmory
Ice Arceus
Calm Mind: Blissey, Chansey, Heatran* (without Earth Power or Focus Blast), Heracross(Choice Scarf), Ho-Oh, Metagross* (without Earth Power), Jirachi* (without Earth Power), Scizor*(Fire Blast will kill), Terrakion(Choice Scarf), Tyranitar*(without Focus Blast)
Normal Arceus
Swords Dance: Giratina, Groudon, Ferrothorn(physically defensive), Lugia, Skarmory* (without Overheat), Terrakion(Scarf)
Defensive: Heatran, Ho-Oh, Reshiram, Lugia, Chansey, Blissey, Heracross, Giratina, Terrakion(Choice Band), Mewtwo, Darkrai, Kyogre
Poison Arceus
Calm Mind: Mewtwo, Excadrill, Gastrodon, Garchomp*(Scarf), Groudon*, Ho-Oh, Heatran* (without Earth Power), Skarmory* (without a Fire-type move), Giratina(Calm Mind), Metagross*(without Earth Power), Dialga(Bulk Up, and hates Earth Power)
Psychic Arceus
Calm Mind: Lugia, Metagross, Jirachi, Scizor, Heracross(Scarf)
Rock Arceus
Mono Attacker: Blissey, Chansey, Dialga*(Bulk Up), Garchomp, Groudon, Kyogre, Gastrodon, Palkia*(without sand), Ferrothorn, Excadrill, Metagross, Scizor*(can only revenge weakened ones), Terrakion, Heracross, Jirachi. NOTE: All of the physical attacker bar Heracross has to be wary of Will-O-Wisp.
Calm Mind: Blissey, Chansey, Dialga*(Bulk Up or use Toxic), Garchomp*( beware of Will-O-Wisps or Ice Beam), Groudon*(watch out for Will-O-Wisp), Kyogre, Gastrodon, Palkia*(without sand), Ferrothorn*(hates burn and dies to Fire-type attacks), Excadrill*(only in sand and hates burn or Fire-type moves), Metagross(without Will-O-Wisp and non-Fire-type attack variants only, Scizor*(can only revenge weakened ones), Terrakion(don't get burned!), Heracross, Jirachi*(Fire Blast kills)
Swords Dance: Bronzong, Groudon, Giratina, Ferrothorn, Kyogre*(Scarf or physically defensive)
Support: Chansey, Blissey, Dialga(with Toxic), Kyogre, Heracross, Gastrodon, Excadrill(only in sand), Giratina*(will end in a stall war unless Giratina has Toxic)
Steel Arceus
Calm Mind: Garchomp*(Scarf and cannot OHKO Arceus), Groudon(hates burn), Heatran, Ho-Oh, Heracross, Gastrodon, Kyogre(Calm Mind), Terrakion(Scarf), Reshiram, Zekrom*(stops Arceus without Will-O-Wisps only)
Swords Dance: Ho-Oh, Groudon, Garchomp(Scarf), Kyogre, Lugia*(can't hurt Arceys back but phaze), Ferrothorn*(can't immediately threaten Arceus), Giratina, Skarmory*(can only phaze or set up Spikes), Terrakion(Scarf)
Water Arceus
Calm Mind: Chansey, Blissey, Ferrothorn, Kyogre* (needs Calm Mind and Thunder), Palkia*(Choice Specs), Dialga*(Bulk Up or Toxic), Gastrodon, Zekrom(Scarf)
Swords Dance: Dialga*(without Earthquake), Groudon, Giratina, Lugia*(hates rain-boosted +2 Waterfall), Ferrothorn, Zekrom(Scarf), Kyogre*(needs Thunder to KO or use Roar to phaze)
Support: Kyogre, Lugia, Chansey, Blissey, Ferrothorn* (watchout for burn), Zekrom(Choice Scarf), Dialga, Giratina(Calm Mind or win with a stall war)
To make things better, I made a poll so you can vote for it! Anyone can vote for multiple choices.