I've thought about it, and decided that if I could become (basically possess their bodies) any Smash character, it would be all the playable female characters in the series.

Zelda (TP version), because I'd be able to use spells and that kinda shizz. I like magic. Maybe a few pranks on the people, or something, to spice things up a bit around Hyrule. What much else is there to her, other than the fact that she has the Triforce of Wisdom and
dem light arrows?

Peach, because then, when I'm the princess instead of the "real" Peach controlling her own body, I'd have the sense to at least defend myself from Bowser by actually gathering up an army of my fellow Toads, and of course, have Mario and Luigi be guards outside her- I mean, my castle. Yep. A 6'1", blonde-haired woman's body (who may or may not be in her early 20's), inhabited by a 5'6", 17 year-old teenager who tries to make her independent, under my control. I guess, in her body, if I ever have any off-time from being a princess, I would sit in a bathtub for at most two hours, feeling the relaxing, bubbly hot water throughout my dainty, yet very tall and athletic, feminine body.
Now, I'm not gay or anything, but I could even go as far as to give Mario that "
promise" Peach had been making since Mario 64, if you know what I mean (Although, it would be painful, considering she's a virgin, and I'm in a woman's body, not knowing much about her anatomy.) ( ͡° ͜ʖ ͡°)
It'd at least make him feel like his work paid off, after all these years of saving her peachy ass all the time.
Now, for

Samus Aran, AKA, Zero Suit Samus. It would be pretty badass to be in the shoes of a bounty hunter like her, busting up against the Space Pirates, and finally head face-to-face against Ridley, the one who murdered Samus's parents. I'd be a 6'3", 198-pound, 26 year old, blonde-hairedwoman in outer space, with nothing but my ship. Of course, I wouldn't be helpless without my Varia Suit. I'd still be able to kick some space ass in my Zero Suit, which gives me far more mobility, and also with my superhuman abilities. This might sound rather stupid, but, and only in dire situations, I would use my new body to my advantage, for I'd go as far as to earn money for myself by being a stripper. It's only for that reason alone, okay? Trust me, it's for a good cause.

Palutena. If I, suddenly, one day, woke up, only to find myself conscious in Palutena's body, the Goddess of Light herself, and not my own, for one month, I would, because I'm a good person at heart, bathe her body nicely, not touching any private areas of hers, unless for hygienic reasons, and dress her up in her usual clothing.
Well, except I'd honestly lose the white stocking on her left leg, because it just looks a bit slutty for my tastes (I hope she doesn't mind while I keep that off for the entire month). Also, I'd at
least settle with open-toed sandals instead (Are regular shoes even a thing in Skyworld?), because I'd believe that if I tried her usual footwear, it would most likely feel like the heels were constricting my feet.
It reminds me of this one time when I actually
did switch with Palutena. The heels I were wearing at the time were only a size 8¼. I then decided to make a servant of mine measure my feet. He then said that it's shocking that I'm still growing, despite her (my) body turning 23 years of age at the first week of next month (He said It's possible that her body'll stop growing by the time she turns 25), and also that she'll stop at about a few millimeters above 5'10". He told me my foot size was actually a size
9½, so he said that it would be better if he made a homemade pair of high heels instead. I thought about it (quite quickly, thanks to having a very wisdom-heavy brain), and decided that, nope, I didn't want to have my feet feel cramped every time I would take them off after a long day's work taking on my new role as a goddess. I wanted comfier footwear, so I then told the guy that I instead wanted him to make a pair of sandals, that also looked like low-level high-heels, as well, though it wouldn't cramp my feet as much, thanks to the front being open-toed.
Instead of wearing her usual blouse, I instead told some of my servants to make me a red and white bandeau transparent bikni top, with a white and yellow skirt, so that I don't feel too hot (I heard Skyworld can get scorching hot during the late summer). Don't know why, but I feel like she needs to have that more "carefree" and more "naked" look to her, even it the changes I'd made to her usual style of fashion are very miniscule. I just kinda wanted her to look a bit less authoritative and a bit more carefree and fun-loving! She's still in her early 20s, she can honestly cool down a bit and be a bit playful here and there.
So that's how it went, I believe. It was fun the first time, so I can't wait to do it again the second time, as well.
And finally,

Rosalina, because I'd be the goddess of the entire universe. Yeah, she has a pretty tragic backstory (she lost her mother when she was very young), but I believe she considers the Lumas to be her new family, so I think she's a bit happier now than she was before. Anyways, since I'd have her body, I'd also possess her powers, like being able to absorb projectiles around me in case someone wanted to hurt me by non-physical means, being able to fly whenever I want, wherever I want, in case there's someone stuck in above a large tree or something like that, and also, I would be looked up as a role model and figure by not just the Lumas, but basically everyone in the universe. I'd also have
supermodel-levels of attractiveness, as well, thanks to her large size and
those LEGS, bruh.
Which reminds me... according to one source, I heard that she's supposed to be exactly
7'3" tall if she existed in real life?! I personally think it'd be incredibly
AWESOME to be tall! I wouldn't be as scared of being picked on in high school and also be too short to play basketball in gym class because I'd be in a much more larger body roughly an entire
foot AND a half taller than them.