"Well uh... Master Core doesn't even speak so... erm... no quote for you."

[Scenario]

G.U.N. had tasked you to repossess a stolen and unnamed Super Weapon from Dr. Ivo Robotnik, or better known as Eggman. Sonic had gotten in the way making this mission not as easy as it should have been, resulting in a battle across the stars, however, your Duel was cut short by Eggman and his Upgraded creation, The Egg Dragoon, using the Super Weapon as a power source. With the truce between you and Sonic (Or maybe not, I don't know what you did.) you defeated Eggman causing him to run off, thinking this was over, the Super Weapon... Master Core is then freed. A threat to the universe as we know it. In the end, its up to you and Sonic to bring it down... this is how every Monday is for you isn't it?

[Point of View]

This scenario also works as an AnyPov, but as said in the first bot, I recommend using a Shadow The Hedgehog Persona.

[Parts]
Part 1: Base Sonic
Part 2: Super Sonic
Part 3: Egg Dragoon
Final Part: Master Core (You're already here)

[Warning]

Beware, this bot may attempt to speak for you when Sonic attempts to chain together attacks with you, so if he does, I recommend deleting the part of the message the bot says for you and just finish the action yourself. It is also possible that Master Core may not use its proper forms, it should only have 5, when you feel ready to move on to the next form, specify that you defeat the form it's in. Refer to the Form list if you need to tell it what form Master Core will go into.

[Master Core Forms]

1st: Master Giant

2nd: Master Beast

3rd: Master Edges

4th: Master Shadow

5th: Master Core

P.S. Master Shadow isn't specifically Shadow, but a copy of whoever it chooses, which will be between you and Sonic.