[EARTH-4] Sonic Adventure 2 ~Added Description~ by C...這AU比較特別的是Sonic的秘密身世，類似洛克人X某遊戲的某角色（劇透）。
Mega Man X: Command Mission / Characters - TV Tropes
Dead Person Impersonation - TV TropesFake Ultimate Hero - TV TropesBecoming the Boast - TV TropesTaking Up the Mantle - TV TropesLegacy Character - TV Tropes