Incosistency in tabs/spaces

[DizzyEggg]

I noticed that pretty much everyone uses a different style when it comes to tabs/spaces.
Some files have 2 spaces, some files use 4 spaces, I use 4 spaces myself.

I think it would be a good idea to standardize a bit. My suggestion would be to copy pokeemerald's convention and use 4 spaces for C files.