Applies to the Plot in Main Story Mode.

Clone Sonic "Tune-Up!":
~ Please, please! Who do I see, our old original night guard!
So... Silent has made you a Leader?!
You think you can stop me from capturing your founder of the Night Resistance?! Give up already! You can't stop me from taking over "The Player"!
Once she's imprisoned, it's a Game Over for you! You'll turn into a "Forgotten One"!
Nobody will remember about you and that you even existed before! HA!

Security Guard Knuckles:
~ Don't be so sure about that, Faker!
She will "SAVE" us and release from this Trap-Game, that your what so called "Master" has came up with. And this time, I'll be sure to knuckle you up properly!
Not for my safety, but for Silent. She is our "Saveiour" and I'll do everything in my power to protect her once she calls me! You'll leave her alone, Evil Clone!
Oh and also a fun fact. You can't hurt me :)
Silent has made us the Security Guards being invincible to attacks, since we are the Summonable Comrades.
And this is thanks to Power of hers Concord Gem Bracelets, infused with the Master Emerald. Better if you'll be the one to give up.