Japanese v1.2.0 (DVD)
The Japanese DVD masters (v1.2.0) are an evolution of the Japanese web masters (v1.1.0).
They were used for the Japanese VHSes and DVDs release (01-52).
Changes from v1.1.0 to v1.2.0
Episode 1
Some animations with a fast-moving background are altered.
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In episode 49, at 05:32, the flashback of Sonic exceeding the speed of sound is left unaltered until v1.3.0.
Episode 39
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Surround audio
Episode 1. Later versions (v1.3.0…) will use the surround audio.