Regular Samus can now transform into Zero Suit Samus with a taunt button

[Crazy Hand 2001]

Or the otherwise unused minus button if you’re playing with the pro controller/dual joycons

How does the metagame change?

 

[Diddy Kong]

She will cover up more of her weaknesses, especially as regular Samus as ZSS is overall a stronger character. Diddy struggles with Samus, but beats ZSS, so that matchup will get a twist now. Dark Samus will be considered totally useless, cause no way Dark Samus is gonna transform into ZSS. Are there any other matchups which would benefit from the transform? Not so sure honestly. But on their own, Samus and ZSS are high tier and Top Tier characters, so this change is gonna be more significant than Zelda and Sheik for sure.

 

[Crazy Hand 2001]

What if dark samus has a completely unique moveset?

 

[Diddy Kong]

That's an entirely different conversation.