A 392:
Mr. Krabs appears to be a crab and therefore likely a vermin. As a vermin, he is mindless and not subject to mind-effecting effects or morale bonuses. He is not feeling it now.
If Mr. Krabs does have an intelligence score, he would be aware if a magical effect came over him, unless the text of that magical effect states that he does not.
A393:
I do not want to cast Legend Lore.