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: Outside of the untouchable Mario/Link/Pikachu/Kirby quartet, one of the safest possible characters. No realistic scenario where she would get cut.
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: Almost guaranteed. I think there would need to be 15 or less characters for her to even be considered for removal, any more than that and the idea's unthinkable.
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: Same as Peach.
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: Probably one of the lowest priority single fighter 1P universes (2nd lowest for me), but I expect all of them to be prioritized to return, so I think they're amongst the riskiest "safe" fighters. I'd expect them to be in danger with 21-25 first party cuts, but I feel that's slightly outside of realistic cut bounds.
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: I would be shocked if she were prioritized over Ridley as the defacto second Metroid character, so by default she's number 3. And with my vison for Smash 6's vet priority, which I anticipate to favor preserving as many 1P universes as they can, I have a hard time seeing a third Metroid rep get priority over any, so I place her in the lower 15-20 of the 1P cast; this puts her in "realistic cut" territory, though her seniority keeps her from being too far down.
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: See Ice Climbers.
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: See Zero Suit Samus; I think she's the safest non-core Mario fighter (so 5th overall, or 7th if you count Yoshi and Wario), but as mentioned above, the envisioned goal of preserving as much on the 1P side as they can makes me doubt any non-core fighters will be too high up; she's at around the top of my bottom 20, so she is in "realistic cut" range, but only with my max realistic 20 1P cuts. I give her a 50/50.
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: Slightly held back by needing assets from other fighters to function, but if 40 or so first parties return, that would include all of them, so at that point, why not include Miis and cash in on their DLC? I only see them getting cut if the roster is under 40 fighters or so, so very unlikely cuts imo.
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: A true 50/50; at the very top of my bottom 20, so I see her either as one of the last finished veterans or one of the last cuts. Not safe, but fairly likely to stick around; amongst the safest "unsafe" characters.
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: I would have though she's a surefire return, but recently, I've come around on the idea of Joker being the secondary Sega returnee in base instead, and I'm not sure they'd do three.
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: She would be part of a modern OG 12. You cannot escape her. Give in to woomy.
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: Same as Peach and Zelda.
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: See Ice Climbers and Wii Fit Trainer.
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: As the de facto secondary reps of the currently active Xenoblade, they seem sure to return outside the fantasy scenario of the roster being under Melee sized.
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: Glorified alts tied to characters who will never realistically be cut. It'd require the entire concept of echos being terminated to purge them methinks.
EDIT: I forgot Sheik. lol. just look at ZSS and Rosalina.