Odd One Out

[Sirfetch’d]

Butterfree isn't a moth!

Chespin, Voltorb, Spoink?

 

[DyingWillFlareon]

Voltorb is the only one available in all games!!
cheating? XD

Frosslass, Gallade, Miltank?

 

[Lycanthropy]

Miltank isn't evolved with a dawn stone.

Zubat, Aron, Magnemite

 

[Sirfetch’d]

Zubat isn't Steel typed!

Lopunny, Kirlia, Mawile?

 

[Starry Windy]

Kirlia can't Mega Evolve yet. Unless if it evolves into Gardevoir, of course.

Happiny, Azurill, Roselia.

 

[Nidorina of Time Lord]

Happiny is the only one that isn't dual type.

Snorunt, Ralts, and Combee

 

[NoOneAtAll]

Combee is the only one being unable to learn TMs.

Mankey, Psyduck, Diglett

 

[Hikamaru]

Diglett is the one without hands or feet I presume.

Audino, Houndoom, Scizor

 

[Golurks Were Meant to Fly]

Audino is the odd one out as it's the only one that didn't get a mega evolution til ORAS.

Zangoose, Tropius and Flareon

 

[Sirfetch’d]

Tropius doesn't get boosted attack from being poisoned c;

Thundurus-t, Jolteon, Ampharos?

 

[Nidorina of Time Lord]

I'm gonna be uncreative and say that Thundurus is the only legendary of the three!

Venusaur, Sceptile and Torterra

 

[Sirfetch’d]

Torterra doesn't have a mega!

Hitmonchan, Sawk, Croagunk?

 

[Sapph the Knight]

Croagunk isn't pure fighting.

Greninja, Politoed, Seismitoad

 

[Sirfetch’d]

Politoed is single typed!

Heatran, Typhlosion, Magmar?

 

[Lycanthropy]

Heatran is the only one unable to learn Thunderpunch.

Sealeo, Kadabra, Swadloon

 

[Sirfetch’d]

Kadabra is the only one that isn't dual typed!

Honchkrow, Bisharp, Weavile

 

[Squirrel]

Bisharp is the only one to evolve through level!

Metang, Dragonair, Shelgon?

 

[Sirfetch’d]

Metang doesn't evolve into a flying type!

Cryogonal, Claydol, Magnezone?

 

[Nidorina of Time Lord]

Magnezone doesn't begin with C and end with L, like Cryogonal and Claydol do.
Crawdaunt, Kingler, Clawitzer

 

[Sirfetch’d]

Crawduant has a second typing!

Latias, Landorus, Cresselia?