unanswered Pokedex 3D Pro (US)-How to decrypt '5z' and 'bcwav'

[gph123]

I unpack the Pokedex 3D Pro file . but pokemon file suffix is '5z' and sound file suffix is 'bcwav' . How to decrypt suffix '5z' and 'bcwav' encryption format

help me please thx

[gph123]

z5 is big trouble . help me decrypt

here a part of the file

http://www.filedropper.com/sound_3

http://www.filedropper.com/pokemon_1