I can't narrow it down but...
Bad Girl from No More Heroes was loathsome. See can kill with one fucking attack when see looks wide open!
The battle against Ness's Nightmare in Earthbound was one I loved and hated at the same time. He has the exact PSI moves that you do, meaning he can do "mortal damage" at any time, which meant that you had to conserve your PP and wait for the right moment to heal yourself in the hopes that it doesn't do the same. (Oh and you're by yourself, because your NPC partner will die after its first attack).
Damn, that battle was tense.
Bad Girl from No More Heroes was loathsome. See can kill with one fucking attack when see looks wide open!
The battle against Ness's Nightmare in Earthbound was one I loved and hated at the same time. He has the exact PSI moves that you do, meaning he can do "mortal damage" at any time, which meant that you had to conserve your PP and wait for the right moment to heal yourself in the hopes that it doesn't do the same. (Oh and you're by yourself, because your NPC partner will die after its first attack).
Damn, that battle was tense.