Well I am happy to report that the install works perfectly and so far the client looks good on OSX using wine.
[trepidation:~] chris% wine --version
[trepidation:~] chris% ps axuw | egrep -i batt
chris 11709 95.5 7.5 3697696 314732 s002 R 11:05AM 2:24.73 /opt/local/libexec/wine/wine C:\Program Files\Battle Dex\BattleDex.exe
I've yet to play a game or anything though, just moving through the screens.
Client under wine is missing ground textures and I assume skybox?
Fonts are also icky and hard to read.
Other than that, everything seemed to work fine.