VGFacts

After listening to Seaside Hill Act 2's music in Sonic Generations, a portion of Ocean Palace's theme will play one minute and twenty seconds in.

Sonic Generations portion: https://youtu.be/L9uO_AGLvhI?t=1m20s

Original Sonic Heroes: https://www.youtube.com/watch?v=rWatUe5yOP8

Okay, that's the Sonic Generations portion.

Now, we're going to need the part of the song its sampling from where its sampling.