Odd One Out

[NyxShooter]

Trevenant is not sem-slug like.

Jolteon, Aegislash, Mew

 

[Ephemeral Euphoria]

Aegislash does not look like a mammal at all, sorry.


Venusaur, Typhlosion, Swampert

 

[Mawa]

Typhlosion is the only one who don't have a Mega evolution.

Swellow, Linoon, Ludicolo

Typhlosion is the only one who don't have a Mega evolution.

Swellow, Linoon, Ludicolo

 

[Mawa]

too hard?
Swellow only have one "o".

Togetic, Crobat, Magnezone

 

[Nah]

Magenzone is the only one not weak to Electric.

Muk, Trubbish, Koffing

 

[Apollo]

Gastrodon's "a" is the second letter, while both Swampert and Skarmory have "a" as their third letter.

Wingull, Poochyena, Lotad

 

[Ephemeral Euphoria]

Poochyena. Not a water type unlike the other 2.


Skarmory, Tyranitar, Blissey

 

[Sonata]

Skarmory is the only one that doesn't have any evolutions.

Magikarp, Finneon, Mantyke

 

[Hikamaru]

Swoobat is the only one who doesn't have Moxie as an available ability.

Slurpuff, Purugly, Raichu

 

[classiccartoonsftw]

Garchomp isn't a Perfect Link Pokemon for a warlord in Pokemon Conquest.

Lilligant, Bellossom, and Cherrim

 

[Abby]

Bellossom is the only one to lose weight upon evolution!

Dialga
Palkia
Sunkern

 

[Nah]

Ninetales is the only one that doesn't get Flare Blitz (as of Gen VI).

Greninja, Seismitoad, Toxicroak

 

[Mawa]

Flygon don't have a mega evolution (yet)

Pikachu, Jigglypuff, Clefairy

 

[Emboar]

Pikachu, it's the only one that evolves when you use a Thunder Stone on it.

Mawile, Turtwig, Heliolisk.

 

[destinedjagold]

Well, Mawile doesn't have an evolution. It's the only one who can Mega Evolve (atm. who knows what GF might do in the future). And Mawile can resist both Normal and Grass moves.

Gallade, Loppuny, and Slowbro~

 

[Piplup36]

Slowbro's Mega Evolution does not stand on two legs.


Psyduck, Rayquaza and Ninetales

 

[ScottyBoyyy]

Rayquaza - only one that is a legendary.

Which one - Clauncher, Skrelp or Binacle?

 

[Emboar]

Skrelp; it's the only one that can be found while fishing with a Good Rod in Ambrette Town in Pokemon Y.

Dugtrio, Oshawott, or Phanpy?

 

[Apollo]

Dugtrio was never owned by Ash.

Starmie, Meganium, Golem

 

[destinedjagold]

Golem is weak against the other two. ^^

Shedinja, Spiritomb, and Gengar ^_^