Honestly, your PT is quite good.
If you want to improve, search for "Zero Switch" and "RCO lag", I think it'll help you a bit.
Just a few things, mostly about Squirtle :
- When you grab, U-Throw is - most of the time - the best option. Don't go for the release to jab when you don't have to refresh other moves, especially if you jab is already stale. Setting up a juggle is way better, considering Squirtle's nice juggling game.
- NEVER stale your D-Throw. That means, NEVER use it unless it'll kill : it only deals 6% (fresh), you can't combo after, and more importantly, you want it FRESH when you grab and the opponent is at kill %. F-Throw/U-Throw/Release + jab are always better when you don't want to kill.
- Against Diddy, I recommend that you switch to
before dying as
, because you can stock tank with
, avoid having your
gimped (so if you switch, you'll die later), tack on damage/kill since
will be fresh, and start the next stock with a fresh
. IMO, it's the best option, but if you don't feel like that, no problem, switching is often something personal.
Oh and I was disappointed when you missed the edgehog after the N-air spike with
.