Suggestions for Character Roles in My Equestria Girls/SpongeBob Parodies

Hi, everypony! P0NYFAN369 here! Okay, I need your help. I just created my first SpongeBob/Equestria Girls story and published it on my FIMFiction account, and I came up with the characters pretty easily. But, I need your help on which other EQG characters I should use for other SpongeBob characters, like Sandy, Pearl, Mr. Krabs. I'm thinking of using Big Macintosh for Mr. Krabs, and either Twilight or Applejack for Sandy, but I would rather wait for your suggestions. And once I get decent a lineup of EQG characters, I could get going on another parody story. But until then, I'll just be brainstorming on the next story. Anyway, that's all for now. TTFN, everypony!
TTFN = ta ta for now