X3
There's Boss from Sonic The Hedgehog 2
Carnival Night Zone Theme from Sonic 3
Emerald Hill Zone Theme from Sonic The Hedgehog 2
Knuckles Theme from Sonic 3 & Knuckles
The legendary Green Hill Zone Theme from Sonic The Hedgehog
Chemical Plant Theme from Sonic The Hedgehog 2
and Robotnik from Sonic The Hedgehog
X3
Bonus:
Dream Land from Super Smash Bros
Both a meme and motivational theme XD