5th Gen If the follow me feature were to be implemented...

[Nakala Pri]

Pikachu! It could hop on my shoulder and be super adorable! Even though having a blue guy following you around all day in a karate costume would rock, pickachu is toooooo cute ^,^

 

[halcyonic]

BLACK KYUREM!!! White Kyurem's an alternative, but not as cool as Black Kyurem & maybe...... an Escavalier & Haxorus, two examples of my fav fully-evolved Pokemon!

 

[Sirfetch’d]

Of course I would have a Jelly follow me. And maybe an Amoongus. That would look cool

 

[chella182]

In Black 2, probably either my Lucario, Ampharos or Charizard. In Black, Charizard or Samurott. Not really sure why, they're just my favourites.

 

[FrostPheonix]

I would love to have it reimplemented. One of my favorite features in HGSS. If it were there, I would have my Braviary or my *ahem* little Gigalith follow me.

 

[mishy.]

On my current White Playthrough I would have Pikachu follow me because it just makes sense to have it follow me for ~reasons~

Unova Pokemon wise though, probably Litwick! Or Maybe Cinccino or Snivy or ... just so many I would love to have follow me. And it would be even better if they had implemented it, and they allowed you to choose which Pokemon follows you; not just whoever is first in your party.

 

[Pikapia]

Oh wow, if only I had a Pikachu! Anyway, I'd have my looooooooovely Emboar follow me. He's so cool!

Also, how do you get a Black Kyurem and a White Kyurem? What's the difference? :P

 

[Cyclone]

Oh wow, if only I had a Pikachu! Anyway, I'd have my looooooooovely Emboar follow me. He's so cool!

Also, how do you get a Black Kyurem and a White Kyurem? What's the difference? :P

Bkack Kyurem is fused with Zekrom. White Kyurem...you get the idea. :)

Cyclone

 

[imevil]

Probably my Exadrill, he carried me through the entire game

 

[TheTimidHoodlum]

Scrafty, Gigalith or Galvantula. Really like those Pokémon.

But if it wasn't Gen V stricted, it would probably be Wailord for the lols.