For some reason, Big Digdoggers and Digdogger Kids seem to fall in Sideview Gravity, even though they ignore walkability on a top-down screen. The fact that obey gravity causes them to act weird in sideview gravity, as they still move through solid combos, and can oddly enough, even climb them. Also, the big Digdogger's animation seems to be messed up in Sideview Gravity.
Also, for some reason, Gohmas also obey gravity, even though they ignore walkability in top-down screens, and have a hard-coded movement pattern, whereas other enemies with hard-coded movement patterns ignore gravity. The fact that Gohmas obey gravity causes them to sometimes fall through the solid combos they are standing on top of.
I'll upload a test quest when I get the chance.