The Scenario
Greater Sci-Fi combatant
Why?
I don't really understand the point of this, but okay. Am I to assume that Morinth tries this her usual way, what with the seduction and stuff?
By franchise:
Super Mario Bros- Mario is highly unlikely to be unfaithful to Peach, so seduction will not work here. However, I can't recall him having any specific defense against mind control, so I suppose he can be Dominated. Luigi, on the other hand, has a known vulnerability to mind control and possession, and doesn't have enough canon material with Daisy to say much on the seduction front. It's entirely possible that both die in a gear free environment. One obstacle that may allow Luigi to survive is the Marvelous Compasses giving him precognition.
Bowser is similarly only interested in Peach, so again a no on seducing him. He has been mind controlled and possessed enough times for that to be a viable tactic, though.
Princess Peach is heterosexual. She has also been mind controlled and possessed, but unlike the others she has shown a degree of resistance, able to break free of the Shadow Queen's possession and resist Nastasia's gaze far longer than any other character.
Final verdict: Mario and Bowser likely die. Luigi can see it coming and prepare. Princess Peach resists long enough use some of her own powers. Mute or Sleepy Time should end any fight that develops, assuming she does enter Rage mode.
Donkey Kong-I don't know enough about DK and Diddy to say. I don't think they have any particular resistance. Diddy brings Morinth's Pedo count to 1.
Yoshi's Island- Yoshi probably dies.
Warioland- The only seduction that would work on him is money related. I'm not actually sure if Wario can die, given his various undead forms.
Legend of Zelda- All Zelda characters have shown enough mental resistance to not be affected by Dominate. Link isn't a viable target for seduction, Ganondorf could survive the mind meld anyway, and Zelda is hetero. Toon Link brings the Pedo counter to 2.
Metroid- Samus has resisted possession from Dark Samus, Ing, and phazon corruption. Dominate isn't an option here, nor is seduction. Again, hetero.
Kid Icarus- Pit is entirely devoted to Palutena, so I'm going to take a wild guess and say Morinth can't seduce him. Pit is protected from certain status effects by divine power and recovers from them quickly. He always has Palutena over his shoulder. Gonna say he survives. Pit is also several centuries old, but looks like a teen. Pedometer 3.
Ice Climbers- Morinth attempts to take Popo, Nana hits her in the face with a hammer. Not much else to say. Pedometer 5.
R.O.B.- Is a robot.
Kirby- Meta Knight and Dedede are vulnerable to possession and mind control, Kirby has no vulnerability, and has resisted some effects that controlled Meta Knight. Kirby likely survives. Kirby is mentally a child, so Morinth is up to 6.
Pikmin- Assuming some size correction is in play, Morinth is swarmed by Pikmin the moment she does anything to Olimar.
Starfox- Fox has Krystal, Falco has Katt, neither are unfaithful enough to seduce. Wolf might be. None of them have any mental resistance that I know of.
F-Zero- I know very little of Captain Falcon, but his setting doesn't really have enough supernatural powers for him to have resistance, IIRC. Probably dies.
Pokemon- No one has any resistance to Psychic, so yeah. Lucario's Steel typing would give resistance if it wasn't cancelled out by being part Fighting. The Pokemon trainer is vulnerable, but Morinth can only affect one person at a time, and she needs to take out 4 targets. Pedometer 7.
Fire Emblem- Ike with Yune's blessing could resist anything Morinth tries. Without, neither Ike nor Marth have resistance.
Earthbound- Ness and Lucas are both more powerful psychics than Morinth, and both have access to PSI shields that block or absorb anything Morinth throws at them. Nonetheless, Pedo count 9.
Game & Watch- I don't even know. Shadow Bugs and/or tentacles everywhere. I don't know if he has a mind.
Metal Gear Solid- I'm not familiar with Snake, but I think he's resisted Psycho Mantis but been vulnerable other things. He likely dies but I can't say for sure.
Sonic the Hedgehog-Pretty sure Sonic lacks resistance and dies.
There, done. I'm still wondering why this exists and why I took the time to respond. My conclusion is that Morinth gets arrested.