Zard's stregnths?
Well for one thing, he's a freaking dragon
I mean, that pri much says everything right there.
Everyone should drop shiek for char. End of story, tyty~
Okay seriously, Charizard's got quite a few positives going for him.
His biggest strength is his power. If you're the kind of player that has trouble killing... you won't with this character.
Rather than list off every kill move he has, I'll take the easy route and list off everything that isn't:
Sourspot Nair, Dtilt, Jab.
...That's about it. At least it would be, except Sourspot Nair can still string into kill moves. As can Jab 2. Jab 3 can technically kill, but they'll rarely ever reach that %. And dtilt's launch angle sets up great for gimps.
This is a big deal when fighting campers or those slippery top tiers. Keep your wits about you, and you can pull out on top. Char only needs to get in a couple of hits each stock to net the kill. He's even more terrifying with rage. If you're feeling especially balsy, one good super armor read can get you the kill when your opponent least expects it. Never sleep on a well timed fly. These qualities also happen to play into his next stregnth
He's the comback king!
Forget lucario, The match is never over until it's over with Zard. Even when matches seem hopeless, all it ever takes is a few hits and two good reads to turn the match around. Every percent they put on you just makes your already formidable kill power that much more threatening.
If Arceus is with you, Zard's Dair is godlike finisher. Few moves in the game are as satisfying.
Speaking of early kills, Char is no slouch in the Edgeguard department either.
You've probably heard of flamethrower for edgeguards, but fair, bair, dair, and ledge trump nair are also solid options when ledge guarding.
He's got some good meaty attacks to cover get up options as well.
Char's got some pretty good range. It isn't shulk-tier, but it's good enough to wall out the likes of Luigi and Mario. Use this to your advantage when fighting speedsters that like to get up in your grill.
The last thing I should mention is his recovery. It isn't god tier, but it's safe. Flare Bltiz will get you back to the stage from practically anywhere.
If you're in the bottom corner of the screen, you're screwed, but few characters can recover from those depths.
*cough*
*cough*
As for tips, it's difficult to know where to start unless ya ask specific questions. Like, "How do you deal with high priority nairs?" I suggest checking out the
Metagame Forum if you're looking for advice.
tl;dr, why do you need a reason to play zard?
He's the best character in the game. 100% no bias.