Watch Sonic Underground Episode 18 English dubbed online free episodes with HQ / high quality. Stream Anime Sonic Underground Episode 18 English version Friend or Foe The band visit the Floating Island in search of their mother. There they meet Knuckles the Echidna, the island’s guardian, who has been falsely told by Sleet and Dingo that the Sonic Underground is after the Chaos Emerald. Knuckles jumps to conclusions and while Knuckles and Sonic battle each other Sleet and Dingo set their eyes on the Emerald.
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