Sonic the Hedgehog and Knuckles from Sonic the Hedgehog 2 HD Phone Wallpaper

A close-up illustration shows the faces of Sonic the Hedgehog and Knuckles facing each other. Sonic is on the left with blue fur and a determined expression, while Knuckles is on the right with red fur and an angry glare. The background is split between dark blue and dark red, with white lightning-like streaks emanating from each character.