Huh. So Adventure Squad sure is a thing. Apparently they are canonically the third game in the series, and Super even references them. Few seem to even know the games exist though.
Interesting how you play as a native Pokemon from the very beginning.
Also
Archive.org has the roms already pre-patched, OP mega does not have the pre-patched roms, you have to patch them yourself.
A small thing, but still.
Anyways here is link to pre-patched roms if anyone can update the OP:
https://archive.org/details/pokemon-mystery-dungeon-wii 