Start off with the characters that are actually meant for beginners. Off the top of my head, I would say any of the following would be suitable:
Since you mentioned liking power,
and
might be to your tastes (and
, but only when he is at high damage).
has some extremely powerful sword strikes. IIRC the second strike of his forward Smash launches further than any other Forward Smash in the game, and his Dash Attack is basically a fourth Smash Attack with how far it launches. He's on the slow side, but has one or two nimble moves like is N-air which is really good IMO, and his specials focus on projectiles which will help you learn those, as his projectiles are easy to understand.
is terrible in the air, but that's why I think he is beginner friendly - he is really good on the ground, so you can just focus on getting good at the neutral and your ground fundamentals with him. He also has a lot of moves with super armour, which basically means that if you get hit while using certain moves, you won't flinch and will still go through with the attack. This means Little Mac can afford to make more mistakes than other characters, and can actually get rewarded in situations where he, quite frankly, messed up and deserved to be hit, but that super armour gets him out A-OK. He also has a counter and a move that's really good for jumping through projectiles. And of course, his KO Punch (which he can use once his Power Meter is full), makes for a great clutch mechanic, and can get you back in the game if your opponent takes an early lead. In general, Little Mac should never be fighting in the air and his ability to recover is poor, but he is really fast, really strong, and can shrug off attacks that would otherwise have been the end of him.
Also,
, while he needs to be unlocked, he is basically a slower and heavier, but more powerful version of
. His recovery is poor and his combo ability does not compare regular Mario, but Dr. Mario has strength that rivals the likes of
and
. So after trying Mario for a bit, I would recommend unlocking Dr. Mario and giving him a shot, since you like power characters.
