No offense, but personally I find such step by step case examples rather useless. A typical noob will have no idea how to apply this to other games and other, normally only slightly different situations. If you don't already know GBA hacking than most of the information there will make no sense to a first time reader. Not to mention it's totally no$GBA specific, people with other debuggers won't be able to follow you at all, since you even included most button presses people need to make. Considering that no$GBA costs a bit of money it's highly unlikely that many people will have it. Also, about a breakpoint snapping at a Bios call, as far as I know those only work if you use a bios image. If you use the integrated emulated bios (and again, most users will unless they know better) it won't snap. Then suddenly you make a jump and you already have found an address. Where do you got it from and why do you know it's the one you are looking for?
I don't want to discourage you, I'd just recommend you think about what you want to do with this document and for whom it should be. Then you may want to think about how to achieve that. On one hand you have it completely noob oriented by even writing every single button press, on the other hand one can't make sense of the information without experience.
Well, of course this is heavily subjective and my own style of learning and writing such documents (although none are released I've plans), but I think a new direction to think about won't hurt you
Btw: I know the irony that my VWF document if basically also a case example. I really only released it since people asked for it specifically. I've meant to write a "proper" (in my eyes) document about it for quite some time now, but I don't feel like one VWF experience isn't enough for such a document yet.
Just think about it