Evade Bug...

PSX and SNES had the Evade Bug... where Darkness didn't make physical attacks miss and Evade bonuses were useless. In FF6 Advance, I think it's been fixed. I did the Lethe River Level Trick and everyone eventually gets blinded by Ink. Some physical attacks actually missed! Edgar was using the AutoCrossbow so Darkness didn't matter for him, but I noticed that Terra would miss once in awhile, where no once ever missed an attack in PSX or SNES.

The only bug I really miss is the Sketch bug that gave hundreds of Dirks (Daggers) and other stuff like Economizers.

Yes, evade works on the GBA. You can still get perfect evasion and mblock on several characters though :]