Mario ain't half bad, Eggman looks like the character definition of the Hotdog Stand windows theme.

(but red and blue)

@Ya Block In color theory, a color scheme is a combination of 2 or more colors used in aesthetic or practical design. Aesthetic color schemes are used to create style and appeal. Colors that create a harmonious feeling when viewed together are often used together in aesthetic color schemes. Practical color schemes are used to inhibit or facilitate color tasks, such as camouflage color schemes or high visibility color schemes. Qualitative and quantitative color schemes are used to encode unordered categorical data and ordered data, respectively. Color schemes are often described in terms of logical combinations of colors on a color wheel or within a color space.

@Ya Block: That's... a color palette.

why there is a flag of russia here?

It's just me or Eggman have rabbit teeth?

Looks like Mario's eye is full of blood, and he's screaming for help

That Mario is so anime-looking, I have no idea why. Just the eye shine and mouth.