What are the Pokemon that are super-effective against themselves?

Question

Such as Aerodactyl and Mega Altaria.
EDIT: BE SURE TO TYPE THEM ALL IN.

Answer 1

Gen 1:

• Butterfree
• Nidoqueen
• Nidoking
• Paras
• Parasect
• Geodude
• Graveler
• Golem
• Gastly
• Haunter
• Gengar
• Onix
• Rhyhorn
• Rhydon
• Scyther
• Dratini
• Dragonair
• Dragonite

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Gen 2:

• Ledyba
• Ledian
• Hoppip
• Skiploom
• Jumpluff
• Yanma
• Misdreavus
• Steelix
• Kingdra
• Larvitar
• Pupitar

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Gen 3:

• Beautifly
• Masquerain
• Ninjask
• Shedinja
• Numel
• Camerupt
• Vibrava
• Flygon
• Altaria
• Kecleon (when either Dragon or Ghost type, due to ability)
• Shuppet
• Banette
• Duskull
• Dusclops
• Tropius
• Bagon
• Shelgon
• Salamence
• Latias
• Latios
• Rayquaza

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Gen 4:

• Wormadam
• Mothim
• Combee
• Vespiquen
• Drifloon
• Drifblim
• Mismagius
• Gible
• Gabite
• Garchomp
• Lucario
• Rhyperior
• Yanmega
• Dusknoir
• Frosslass
• Rotom
• Palkia
• Giratina

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Gen 5:

• Excadrill
• Sewaddle
• Swadloon
• Leavanny
• Dwebble
• Crustle
• Scraggy
• Scrafty
• Yamask
• Cofagrigus
• Frillish
• Jellicent
• Archen
• Archeops
• Litwick
• Lampent
• Chandelure
• Axew
• Fraxure
• Haxorus
• Stunfisk
• Druddigon
• Golett
• Golurk
• Deino
• Zweilous
• Hydreigon
• Cobalion
• Terrakion
• Reshiram
• Zekrom
• Meloetta-Pirouette

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Gen 6:

• Greninja (when either Ghost or Dragon type, due to Protean)
• Vivillon
• Pangoro
• Honedge
• Doublade
• Aegislash
• Dragalge
• Tyrunt
• Tyrantrum
• Amaura
• Aurorus
• Hawlucha
• Goomy
• Sliggoo
• Goodra
• Phantump
• Trevenant
• Pumpkaboo
• Gourgeist
• Noibat
• Noivern
• Zygarde
• Hoopa

Gen 7:

• Rowlet
• Dartrix
• Decidueye
• Crabominable
• Sandygast
• Palossand
• Minior
• Turtonator
• Drampa
• Mimikyu
• Dhelmise
• Jangmo-o
• Hakamo-o
• Kommo-o
• Lunala
• Guzzlord
• Naganadel
• Blacephalon

Gen 8:

• Cinderace (When a Ghost type due to its Ability)
• Applin
• Flapple
• Appletun
• Sinistea
• Polteageist
• Impidimp
• Morgrem
• Grimmsnarl
• Cursola
• Runerigus
• Dracozolt
• Dracovish
• Dreepy
• Drakloak
• Dragapult
• Eternatus
• Urshifu Single Strike
• Regidrago
• Spectrier

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Mega Pokemon:

• Mega Charizard X
• Mega Gengar
• Mega Pinsir
• Mega Aerodactyl
• Mega Ampharos
• Mega Banette
• Mega Garchomp
• Mega Lucario
• Mega Steelix
• Mega Sceptile
• Mega Camerupt
• Mega Altaria
• Mega Salamence
• Mega Latias
• Mega Latios
• Mega Rayquaza
• Mega Lopunny
• Primal Groudon

Hope I helped!

Comments

All the work......... I am speechless for once in life

Answer 2

There are a lot of them:

• Meloetta (Pirouette)
• Numel / Camerupt
• Volcanion (although not officially released) (NEUTRAL)
• Larvesta / Volcarona (NEUTRAL)
• Magcargo
• Heatran
• Chinchou / Lanturn (NEUTRAL)
• Rotom W (NEUTRAL)
• Lotad / Lombre / Ludicolo (NEUTRAL)
  ...

Essentially, if a dual-typed Pokémon has one type that is super-effective against the other (e.g. Ludicolo is Water/Grass. Grass is super-effective against Water), it would be considered "super-effective against itself". Also, any Ghost-type or Dragon-type Pokémon is super-effective against themselves. There are a huge amount of such Pokémon. If you want to see the full list, look at the source.

Source: [Dual Type Chart][1]

EDIT: Massive thank-you to fondant for pointing out neutral damage.
[1]: http://pokemondb.net/type/dual

Comments

Type them all out please?

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I would but I don't want my answer to be gigantic. If you want to see all of them, look at the source : )

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Ludicolo, Volcarona, Volcanion, Lanturn, Rotom-W and Ludicolo are all wrong. Their typings mean they take neutral damage of what they would otherwise be weak to.

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Good point. Forgot about neutral damage. Thanks for the reminder

Answer 3

Dragon type are