Ssssss...That's a hard choice...Hm, let me think on it, right quick like.
Alright, here's my assessment. I made the Taillow-line an attacker Pokemon, with a decent amount of Defense. While, the Swablu-line are more like a tank...But with a decent amount of Sp. Atk.
Tho, Taillow's moveset is WAY better than Swablu's, but Swablu can hold itself down more in a Pokemon battle. Plus they have higher ratio of female. Gotta love da chicks. LOL
If I had to choose, I would say stick with Taillow...It's not that I don't like Swablu...Taillow can get the job done more quicker and it's speedy. Not to mention, Altaria's double weak against Ice. :p
Alreadt, I watched your vid, dude. Comment it, liked, fav'd, da work. It deserved it. It was tight ass hell.
And yes, you can catch every starter Pokemon from every region. As for recommendations, I dunno...I guess you could try training a Spinda, I actually made them stronger and worth training. Oh, and you could also catch a Huntail or a Gorbyess. I think you'll might like what you see once you train it. If you decide to make a Gorbyess, make sure it's male. I made gender differences.
Dude, I could tell you train a bunch of Pokemon on that game, but I'm afraid you can only carry six at a time. I changed EVERY Pokemon moveset except for Numel-Line, Diglett-Line and Slugma-line...Couldn't think of anything to add to them. Their moveset were already good.