Odd One Out

[Worst Username Ever]

How this game works: 4 Pokémon are posted. Try to guess which one of them does not "fit in", and why. If you're right, it's your turn(remember, the original poster has to say you're right!)

It's also allowed to give hints if nobody gets it for a long time, or say things like "You're on the right track", "that's close", ect.

The answer can be anything from the Pokémons' looks to stats. It doesn't even have to be "official", but make it something people can possibly guess and not too obscure(For example: "Ditto, Exeggcute, Cherubi and Steelix, it's Steelix because it doesn't look like food" "Seaking, Mudkip, Pikachu, Slowpoke, it's Pikachu because it's not a meme" would not be accepted because it can be pretty obscure)

I'll start off with an easy one:

 

[M&F]

Umbreon's the only pure Dark-type in the bunch.

 

[Worst Username Ever]

Right.
Your turn.

 

[M&F]

There's one thing in common between all of them, too. If you figure that out, you'll be one step closer to discovering the odd one.

 

[Worst Username Ever]

Pidgeotto has no "a" in it.

 

[M&F]

Well, that makes sense, but it isn't the logic I used.

Does it count?

 

[Worst Username Ever]

It does not count if it's not the answer you're looking for.

Let's see... Magmortar because it's a single-type?

 

[M&F]

Torkoal's a single type too.

So no.

 

[Karkat Vantas]

Zubat because it has no legs?

 

[M&F]

Zubat because it has no legs?

It does have legs actually. It just doesn't use them.

So wrong.

 

[Ether's Bane]

Zubat because it can't use TM's/HM's.

 

[Adriane]

Zubat because it can't use TM's/HM's.

Since when?

 

[Igziglor]

Torkoal because it is the only one on 4 legs.

 

[Worst Username Ever]

Zubat has no eyes.

 

[Ether's Bane]

Since when?

Oops, I meant HM's. My bad.

 

[M&F]

Some of these make sense, but neither are the logic I picked.

Perhaps I made a mistake in picking a quirky Pokémon like Zubat to include in the possibilities.

Anybody want a hint?

 

[Worst Username Ever]

Hint please.

 

[M&F]

Look into these Pokémon's movepools and find out which moves all of them can learn.

And exclude the extremely widely learned ones like Return and Toxic.

 

[Worst Username Ever]

Torkoal can't learn Thief? *guess*

 

[nothing to see here]

...Zubat has never been used by a Gym Leader or anyone in the Elite Four?