Play as Knuckles the Echidna in the modified game “Sonic And Knuckles & Sonic 2” and take on powerful enemies in challenging levels. This ROM hack, also known as “Knuckles the Echidna in Sonic the Hedgehog 2,” combines Sonic the Hedgehog 2 with Sonic & Knuckles. As Knuckles, you’ll navigate levels using his unique abilities and strengths, facing off against new enemies and encountering changes to enhance difficulty. While the core levels remain familiar, various elements have been altered to provide a tougher and more challenging gameplay experience.