Gengarchomp
The first Mythical to have a signature move + Beads of Ruin.
What is Jirachi-yu? (Jirachi + Chi-Yu)
The only Electric-type Pokemon with Rivalry + the only Pokemon that does not need a Mega Stone to Mega Evolve.
What is Luxrayquaza? (Luxray + Rayquaza)
The only Ice/Bug Pokemon + a male Burmy.
What is Frosmothim? (Frosmoth + Mothim)
The only Fire/Normal Pokemon + the counterpart of Iron Valiant.
What is Pyroaring Moon? (Pyroar + Roaring Moon)
The only Bug/Fairy Pokemon +#0015 in the National Pokedex.
What is Ribombeedrill? (Ribombee + Beedrill)
#1000 in the National Pokedex + the only Pokemon with Galvanize.
What is Gholdengolem? (Gholdengo + Golem)
The box-art Legendary of Pokemon Black + the only mono-type Fossil Pokemon.
What is Reshirampardos? (Reshiram + Rampardos)
The only Grass-type Pokemon with Telepathy + the only Pokemon that can learn Aeroblast.
What is Tapu Bulugia? (Tapu Bulu + Lugia)
The only Normal-type Pokemon with Shed Skin + the only Generation 8 Mythical Pokemon.
What is Cyclizarude? (Cyclizar + Zarude)
West Sea and East Sea + the tallest Generation 9 Pokemon.
What is Gastrodondozo? (Gastrodon + Dondozo)
The only Dragon-type Pokemon to learn Burning Jealousy + the first pure Flying-type Pokemon.
What is Turtanatornadus? (Turtonator + Tornadus)
The only Water-type Pokemon with Sap Sipper + the highest Attack stat of any Starter Pokemon.
What is Azumarillaboom? (Azumarill + Rillaboom)
The tallest Electric-type Pokemon + the only Electric-type Pokemon with Strong Jaw.
What is Raging Boltund? (Raging Bolt + Boltund)
Hakadog (Japanese) + the parallel of Eiscue.
What is Houndstonjourner? (Houndstone + Stonjourner)
The only Bug-type Pokemon with Sticky Hold + Huntail's opposite.
What is Accelgorebyss? (Accelgor + Gorebyss)
The only Dark-type Pokemon that is 100% female + the heaviest Bug-type Pokemon.
What is Mandibuzzwole? (Mandibuzz + Buzzwole)
The only Dark-type Pokemon with Justified + Tate's ace Pokemon.
What is Absolrock? (Absol + Solrock)
The Imitation Pokemon + the only Flying-type Pokemon with Run Away.
What is Sudowoododrio? (Sudowoodo + Dodrio)
The only Generation 6 Pokemon with a Mega Evolution + the longest cry of any Pokemon.
What is Diancetitan? (Diancie + Cetitan)
The only Pokemon with Receiver + the only Normal-type Pokemon with Psychic Surge.
What is Passimindeedee? (Passimian + Indeedee)
The only Pokemon before Generation 8 to have Sharpness + the only Bug-type Pokemon with Iron Fist.
What is Galledian? (Gallade + Ledian)
The main antagonist of Pokemon Mystery Dungeon: Explorers of Time/Darkness/Sky + one of two Electric-type Pokemon to learn Present by breeding.
What is Darkraichu? (Darkrai + Raichu)
The highest base HP of any Pokemon + the prototype name "Neptune".
What is Blisseaking? (Blissey + Seaking)
The Legendary Pokemon + the only Alolan form obtainable in the Hisui region.
What is Arcaninetales? (Arcanine + Ninetales)
The only Rock-type Pokemon in the Amorphous Egg Group + a 5% chance of holding Light Clay in the wild.
What is Magcargolurk? (Magcargo + Golurk)