Gee Bill! How Come Your Mom Lets You Eat Two Wieners? - Prediction: A Nintendo X Capcom Collaboration Is Coming

Because you have nobody else, Sega.

Well maybe if you had series we would give a crap about still, Sega, maybe you could have gotten another slice of that cake. Meanwhile Capcom's mascot is, imho, rather loosely defined. As in, they don't have a definite mascot.