User blog comment:Iamthelegion/Game On! Rap Battles news with Sans/@comment-25872721-20160216072322

Hints.

That's the pokepasta Buried Alive. BA was the original Lavender Town boss (according to creepypasta lore). One of BA's quotes is "Finally, fresh meat!" I'm sure that something similar to that line is from some game, but I can't remember what game it was.

USA vs Russia. Cold War? American vs Russian? Those are fists so boxers or fighters? No idea.

No idea about that second hint.