3rd Gen The first Pokemon you caught is ......

[Peter Quill]

The first thing I ever caught in FR/LG is Pidgey. I always catch that burd first when I get my first few Pokeballs

 

[painquantum]

Probably Pidgeot, it's one of the few good ones that you can find in generation 1 at the beginning.

 

[Pepperton]

My first catch in FRLG was a Caterpie. They're probably the most adorable basic Bug Pokemon in the franchise, and Butterfree can actually be quite the team member if used correctly. Before leaving the forest, I grinded my little guy all the way up to ten so I went in with only a Charmander, and came out with a dazzling Butterfree. You could say I felt pretty important walking out of those woods :]

 

[LavenderTownGhost]

Rattata to use as an HM slave, unfortunately. ;( Poor thing.

 

[7supersonicfan]

On my LF, my first pokemon was a pikachu in Viridian Forest. I still use it on my team, he is a level 65 raichu now.

 

[billyfig]

Not very sure, but i think it was a Pidgey in FR

 

[acatfrommars]

I remember the first time I played FireRed, I caught a Pidgey first. I ended up giving Fly to Charizard and Pidgeotto by the time I reached the Elite Four. :)

 

[Itcheeee]

My first was Caterpie, did this in memory of my favorite classic episode of the anime ;P

 

[Scotash!]

Nidoran, always fun to have a nidoqueen on the team! Plus, extremely handy for Brock!

 

[WhiteLioness]

I own fire red version and Pokémon red (first generation). The first Pokémon I caught was maybe a caterpie or a Pikachu, I forget.