Details, details. You got them and that's what matters.
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Reaper: *summons a giant sphere of dark energy, before firing it at the fireballs and destroying them*
Amanda: Um... *shakes her head* I don't think they're completely immune to Game Overs. if all, I think they may be destroyed.
Meta Knight: Then we should fight.
Amanda: ...The problem is that the Reaper is immune to normal weapons and attacks. Only mystical and dark magic attacks can hurt him, and he's very resistant to dark magic.
Meta Knight: ... *withdraws his sword* I suppose you two have the best chances to defeat that monster. I'll go look for Alucard, then.
Amanda: *nods* Okay. Be careful.
Meta Knight: *nods back* You too... *moves his cape above him, disappearing from sight*
Bowser: ...It's a long story. *turns to the Paragoomba* You, Paragoomba! Go search my son!
Paragoomba: Y-Yes, my King! *flies out of sight, looking for the prince*
Sammy: Hello? Is anybody home? *tries to look into the window* Hmm...
Freddy: Let me think... *grins* I know! Some electricity!
Walter: ...Why should I do that?
Aika: So maybe a comedy? *shows a mischievous grin, even if her mental message is way different* If only it was that easy... his mecha can repair itself, so we would return to point one and I would be targeted as well.