Here is a list of all the Power
Bombs in Metroid Prime 2: Echoes. Here you can see the entire list
on how I picked them up to give you the most advantage during the
hard boss battles in Metroid Prime 2: Echoes.
Using this guide and some backtracking you will come prepared to
your encounters as good as you can get prepared. In this case YOU
ARE PREPARED! (wow anyone?) I will not describe exactly how to collect
them, that I leave up to you I do not wish to spoil the fun of exploring.
All I do is give the number which area and which room you have to
look the rest is up to you.