Can anyone confirm that Spacies were able to Firefox after Side-b? Friends were incredibly adamant that it was happening when they were at the bestbuy demos, but I wasn't able to go.
yes, but the endlag after an aerial fox illusion is so large that I wouldn't expect it to be that amazing as a recovery option as it will only be useful if you've been knocked higher than the stage ledge, if you're lower than the stage it's not going to help.
It's main reason for inclusion is to stop bad players for side-b-ing off stage and killing themselves.