Odd One Out

[waveguidebuizel]

Ampharos because it doesn't have a signature move (at least, not that I can think of).

Duosion, Eelektrik, or Floette?

 

[Fernbutter]

Floette

Why? Because Fairy egg group. That's why.

Cyndaquil, Totodile, or Chikorita?

 

[Nah]

Totodile, because its name doesn't start with C.

Genesect, Lugia, Mewtwo.

 

[Hero of Twilight]

lugia because he is the only one who wasn't created by humans

steelix, gastrodon, or victreebel?

 

[Arma]

Steelix, He ain't slimy like the other two.

Geodude, Cloyster or Arcanine?

 

[wsNova]

Arcanine since he's the only one who doesn't have a "round" shape associated with him.
Magikarp Ninetales Weezing

 

[Sopheria]

Ninetales is the only one with legs.

Diglett, Oshawott, Whismur

 

[Arma]

Oshawott usually isn't found in caves, unlike those other two.


Ninjask, Carnivine or Hypno?

 

[Nah]

Hypno, since it doesn't float/fly/be immune to Ground.

The odd one out between Charmander, Torchic, and Fennekin?

 

[Sopheria]

Torchic is the only one whose first stage evolution is dual type.

Empoleon, Skarmory, Metagross?

 

[Arma]

Metagross ain't no bird!


Hoppip, Skrelp or Spoink?

 

[lucariokul]

Hoppip is the favourite Pokémon of a YouTuber named TheJWittz.


Lucario, Dragonite, Absol.
(Can I request a new rule? I think the next to post must include the odd one out in his post. Just my opinion.)

 

[eeveeandmew]

absol because i love it.
mew, arceus, mewtwo

 

[lucariokul]

Arceus is the only god-like pokemon there.


Riolu, Hawlucha, Machoke.

 

[Arc]

Hawlucha. He's the only one there with a secondary typing.

Growlithe, Lampent, and Eevee.

 

[Nah]

Eevee, since its not a Fire type.

Honedge, Slurpuff, Voltorb.

 

[Wicked3DS]

Voltorb is the only one without limbs.

Gengar, Blaziken, Garchomp?

 

[Sopheria]

Blaziken is the only one who doesn't gain a new ability when it Mega Evolves.

Eevee, Starly, Litleo

 

[CrazyElectrode]

Litleo because its a fire type in the card game and the other 2 are normal types.

Lets see, Ninetales, Tauros, and Slowpoke

 

[waveguidebuizel]

Slowpoke only has one tail. Unless it's cut off.

Ho-oh, Alomomola, or Girafarig?