Sonic X

Can't imagine Sonic listening to Undergrounds wailing Meat Loaf light rock, but he'd definitely jam to Sonic X." Jones praised the rock music from Sonic Adventure 1 and 2, as well as the "pretty piano music" and "catchy" Japanese intro and outro themes.

Jones described Chris as "a dull, boring, uninspired character" and also described Tanaka and Ella as "bland" stereotypes of Japanese and African-Americans, respectively.

The series included three ending themes: by Run&Gun for episodes 1–13, by Aya Hiroshige for episodes 14–39 and again for episodes 53–78, and "T.O.P" by KP for episodes 40–52.

Three songs by Off Course, "Kotoba ni Dekinai", "Midori no Hibi" and "Natsu no Hi", were featured as insert songs in the original broadcasts of episodes 26 and 52; these were replaced in subsequent broadcasts and home releases.

Tracks from Sonic Adventure and Sonic Adventure 2 were used infrequently during some episodes, including Sonic Adventure 2 theme "Live and Learn" by Crush 40 in episode 38.

Tim Jones of THEM Anime gave the show two stars out of five and criticized the English voice acting: "It's really annoying how all the recent Sonic games use these untalented actors/actresses in their dubs, because they make the original English voices sound like award-winning performers." Other comments on the show's aesthetics were mostly positive.