gen 1- Hard since I don't usualy jump into this reigon but I've always loved pidgey, and maybe growlithe aswell
gen 2- cyndaquil, just straight up
gen 3- Mudkip, Seviper, Poochyena, ever ralts
gen 4- Shinx, plain and simple, though I did consider turtwig
gen 5- all of them, I'm not picking one...