@dankcushions with setting 480p as resolution and disabling shaders slowdowns in Tekken 3 are minimal now.
nice! but you really don't have to use 480p. like i said, pscx-rearmed is full speed (other than the same slight micro-slowdown emulations issues) on a pi2 at 1080p at default settings.
So in the end it seems my both saves were bad.
I downloaded 3rd save from http://emusaves.emuunlim.com/saves/dexdrive/saves.htm, converted to .mcr with mem manager
and just placed it as .srm file in my folder. Then in Tekken3 I went to options and did: card load.