EDIT 4/11/2020: Captions are up now. Enjoy. :^)
I did this for fun. It took only 2 hours to edit, so I hope it was worth it?
Edited with Adobe Premiere Pro CC 2018.

Original video from Davie504: https://youtu.be/CLVqCGokBco

Sources used:
Sonic Adventure 2 (Dark Story + Final Story) | Real-Time Fandub Games by SnapCube - https://youtu.be/IMC0uZY2iH0
𝓟𝓔𝓐𝑪𝓔 𝓐𝓝𝓓 𝓣𝓡𝓐𝓝𝓠𝓤𝓘𝓛𝓘𝓣𝓨 by 
Manndarinchik - https://youtu.be/dbn-QDttWqU
E G G - A Hat in Time.
Megalovania - Undertale.
Some sound effects.