Royalty - Sonic BOOM x UNDERGROUND XOVER

This is a BL story, don't like then get off.

What's the ship you ask? A slow burn Knuckles x Sonic. Yeah, a Slowburn.

Huheuheuehuheuuehe

Summary:

Knuckles, The last Echidna, The Crown Prince's most trusted Knight. Despite only being 9, the Crown Prince ruled over Mobotropolis for a short period of time until his Mother arrives. Some mistakes here and there but the Prince kept his head high; just like every other ruler before him.

He was 10 when the Crown Prince's reign was officiated, Manic and Sonia gushed at how brave he was for doing this for them. No one could come close to the Crown Prince in terms of loyalty and bravery.

Knuckles feels honored to be his personal Guard when he was only just 10.

Until Robotnik attacked and ruined. EVERYTHING.

Knuckles now has to play dumb. Now he has to start from square one. All because Robotnik attacked during the Queen's return. All because Sonic punished Robotnik by sending them both to another world to continue their fights there. All because Sonic had amnesia.

Knuckles HATES Robotnik for that.