Similar monsters from FFXI to FFXIV? (examples)

[Naraku_Diabolos]

The flans are in XIV and look identical to the ones in XI

I never got to fight a flan in FFXI, but only in FFTA and FFTA2, as those were nearly immune to damage from weapons, and only magic could damage them? They are a pain in the butt as well.

[Elexia]

I never got to fight a flan in FFXI, but only in FFTA and FFTA2, as those were nearly immune to damage from weapons, and only magic could damage them? They are a pain in the butt as well.

Depends. By default they're weak to magic, however some of them like boss types (Princess Pudding, Cumin Custard etc) are weak to only certain elements and absorb their respective element.

They also have an "ability" when they grow spikes which is when you'll be able to hurt them a bit more with physical damage. Non-elemental damage also does boosted damage to them like using one of the new Sword WSs you get at 96 will bypass their physical defense.