Sonic and the Black Knight Unlockables

Unlockable Characters
You can unlock seven characters by completing certain things as shown below.
UnlockableHow to unlock
ShadowDefeat Sir Lancelot.
BlazeDefeat Lady Percival.
KnucklesDefeat Sir Gawain.
Amy RoseDefeat the final boss.
TailsComplete the first Castle Camelot mission.
SilverComplete the Lancelot Returns mission.
King ArthurCollect all 5 of the King Arthur Legends.
JetGet 5 Mastery Stars in the timed Great Megalith mission.
aiaiplay as sonic 2 times on battle
ulalaplay as amy 5 times on battle
nightsplay as shadow 3 times on battle