Create an intense character select theme for the video game "Sonic: Showdown" in the style of Tekken's character select screen. The track should be a fusion of nostalgic 16-bit and 8-bit chiptune with modern EDM and Synthwave elements. Infuse the music with an energetic and uplifting vibe, while also maintaining an ethereal and angry undertone. Incorporate powerful electric guitar riffs, complemented by the Juno Synthesizer, organ, choir, pad, harpsichord, and analog synth. Keep the tempo moderate to match the gameplay intensity and heighten the overall experience.