Seeing as how there are thousands of people capable of doing hacks on Brawl
EG: http://forums.kc-mm.com/Gallery/BrawlView.php?Moderated=1&Reported=All&Wifi=0&Name=*cloud*&ByUser=*&Credit=*&Info=*&Thumb1=*&Type=**&TypeAlt=*
No, Wii games are just really easy to hack, like the amount of stuff on Brawl proves that anyone with Brawlbox can hack, granted it seems they're making entirely new tools for Galaxy 2.5, good stuff. But once normal people get the tools, it won't look so talented.
Hopefully 2.5 will be really fun however, I'm hype.