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: Rosalina-Yoshi is one matchup I've played at least a couple hundred times and I personally feel that Rosalina does well in the matchup. She doesn't do so well to the point where she completely shuts down every one of Yoshi's options, but she has the advantage. Gravitational Pull completely nullifies those pesky eggs of his, so he won't be able to just camp you for the entire game. His approach game isn't the best (which is why Yoshis tend to camp with eggs and force you to approach), so Rosalina doesn't struggle with keeping him out. This puts Yoshi in the awkward position where he's continuously forced to approach Rosalina (since camping her is out of the question) or try and bait Gravitational Pull in order to punish her (and if you read these baits, you can get a pretty big punish). Yoshi is also pretty floaty, making it easier to kill him off the top with up airs than other characters in his weight class. As long as you know what you're doing, Rosalina can definitely give Yoshi trouble.
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: For starters, his camping game is way better than Yoshi's, meaning that, when you both try and camp one another, Villager is going to win and force Yoshi to approach which, as I've said before, Yoshi isn't the best at. In terms of recoveries, Villager's is stupid and Yoshi's isn't good. Therefore, when Yoshi is off the stage, you can go really deep and just edgeguard him with little risk involved.
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: Sure, Cloud has a better neutral. However, Meta Knight wrecks him offstage and his up air -> up air -> up b kill combo works very well on Cloud because of his high gravity and above average falling speed.
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: Contrary to what one may think, a lot of Clouds hate Falcon. Falcon is so quick and has good approach options, so Cloud can't just Limit camp him and punish the forced approach. Falcon's combos also destroy Cloud because of his aforementioned stats.
These are just my thoughts on the matter. Hope these help!