Odd One Out

[Judge Mandolore Shepard]

Chimchar is the only one that is a Starter Pokemon

How about Garbodor, Aegislash, and Vanilluxe

 

[destinedjagold]

Garbodor isn't floating. :P

Celebi, Victini and Jirachi~

 

[Nah]

Victini, since it has a STAB that is super effective against the other 2.

Zekrom, Reshiram, Kyurem

 

[Hawkman32]

Kyurem- Didn't have a cutscene in black or white.
Machoke, Gurdurr, Hitmontop

 

[Sonata]

Hitmontop is the only one that doesn't evolve.

Sawk, Hitmonchan, Hitmontop

 

[Apollo]

Sawk isn't part of the Hitmon- evolution family.

Reuniclus, Gardevoir, Alakazam

 

[Abby]

Gardevoir has a split evolution.

Skuntank zuba and koffing (:

 

[Nah]

Skuntank is the only one not introduced in Gen I.

Shelgon, Relicanth, Houndoom.

 

[waveguidebuizel]

Shelgon looks like it has no difficulty rolling forward.

Quagsire, Scraggy, or Victini?

 

[Khoshi]

Quagsire, the only out of the 3 who can't learn Zen Headbutt.

Togekiss, Kirlia, Snorunt.

 

[Yato]

There are two possibilities o: The first is Snorunt because it isn't Fairy; the second is Togekiss because it isn't a branched evolution nor is part of a line where the Pokemon has to be a certain gender in order to evolve into another Pokemon. I'm guessing Snorunt is the correct answer, though XD

Umbreon, Sylveon, Espeon.

 

[ShivaDF]

Sylveon's the odd one out because Wes didn't have one as a starter.

Vivillon, Butterfree, Beautifly.

 

[Hiatus]

They're beautiful and I personally love them all equally, but... I'd have to pick Vivillon out, since it's the only one out of the three that has forms. ):

Machamp, Lucario, and Conkeldurr.

 

[Skystrike]

Lucario is the only one who can learn Aura Sphere out of them. It's also the only dual type.

Let's try Articuno, Suicune and Kyogre.

 

[Nah]

Articuno, since its not Water type and has a 4x Stealth Rock weakness.

Audino, Chansey, Furret

 

[orangeralts21]

Chansey is the only one that has a 3 step evolutionary line.

Growlithe, Poliwag and Oddish

 

[Khoshi]

Oddish is the only one out of the 3 to have a dual typing.

Mawile, Azumarill, Whimsicott.

 

[genga91]

Whimsicott is the only one that doesn't have spots

Snorlax, Jynx, and Ursaring

 

[Pasasin]

Keldeo because he is a special Pokemon, he isn't obtainable in the main game.

 

[Nah]

Whimsicott is the only one that doesn't have spots

Snorlax, Jynx, and Ursaring

Ursaring, because its the only one that was introduced in Gen II.

Treecko, Mudkipz, Cyndaquil