Your Ike is pretty good; nice work. While I haven't played a good PT before, I'll try to give the most constructive criticism as possible.
For the Squirtle portion of the match, you should've abused your range more and keep him out with more jabs. I'm not sure if Squirtle is quick enough to punish you for a missed FAir when properly spaced, but you should try that out.
Against Ivysaur (or any tether-recovery opponent in general), try to gimp more by knocking him out with FAir, BAir, or even dash attack when he tries to get back onto the stage with his second jump, then edgehog him when he tries to up+B. I'd offer more suggestions, but I'm unfamiliar with this match-up.
Against Charizard, try refraining from QD when recovering; as you found out, it got you punished by Flamethrower. Shut him out more with FAirs and jabs, but watch out when he uses Flamethrower. Try to keep him above you; he can't really do anything there except DAir. Watch out for his vertical range when he's on the ground.
As some general comments, go for grabs when you set them up or when you're punishing for lag; I wouldn't advise trying to run up for a grab since Ike's range isn't that good. Try using FTilt more; it has extremely high knockback (even more than BAir) and has great range as well. Use UAir more as well - like FTilt, it has great knockback (it kills about the same % as USmash from the ground) and has enormous priority. Overall, good job with your Ike.
