So you want Marching Milde as your 1-4 Boss?
Okay. Firstly, you must swap around values, both for before AND after transformation. In your case:
[02 21 70] 1-4 Burt the Bashful
[A2 21 70] 4-4 Marching Milde
[CA A5 5F] 1-4 Burt the Bashful
[06 A6 5F] 4-4 Marching Milde
Copy the Marching Milde colour codes over the Burt the Bashful. This will make your codes:
[A2 21 70] 1-4 Marching Milde (was Burt the Bashful)
[06 A6 5F] 1-4 Marching Milde (was Burt the Bashful)
The Before Trans. values are located at 6678D-667B0, and the After Trans. values are at 66769-6678C.
(I'm not all that familiar with Boss Relocating, but i'm pretty sure that's basically how it's done.)
Hope this helped