blargSNES doesn't support special chips.Maybe its better on blargSnes 1.3b, super fx 2 chip too strong
EDIT: Just tried it on cat, seems to be solid 50 to 60, cia version n3ds, its ok for me
EDIT2: so blargsnes cant open yoshis island (1.0).fig and crashes with the .sfc, but the .fig runs better than the sfc in catsfc