Finally got my laptop's hard disk restored!
Somewhat based on the fanfic by Bob from Bottles' "The Worst Bakers in Equestria"
As for why Cadance is here, I think she makes a nice contrast for Luna and would be a good friend (and it's not like this comic follows canon anyway, so I can stick in anyone!)
P.S yup, it's a negima reference!
(c) Hasbro and Lauren Faust for MLP FiM and all associated characters
Cadance's cutiemark: [link]