[Capcom vs. SNK 2: Mark of the Millennium 2001] : Yuri & Sakura
Whereas every SNK character was given a brand new set of sprites for Capcom vs. SNK 1 & 2, only half of Capcom's cast received original sprites. The other half simply use their sprites from the Street Fighter Alpha series, albeit slightly resized to better match the proportions of everyone else.
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Sources:
Capcom vs. SNK PRO (Dreamcast) Osaka stage uploaded by @the2dstagesfg (website: Tumblr) (page: the2dstagesfg.tumblr.com)
Capcom vs. SNK 2: Mark of the Millennium 2001 Yuri sprites uploaded by Insanius (website: The Spriter’s Resource) (section: Capcom vs. SNK 2)
Capcom vs. SNK 2: Mark of the Millennium 2001 Sakura sprites (website: Mugen Infinity Team) (section: Capcom vs. SNK 2)