As shown in Ready Player One, players can have weapons and items from any game or form of media, including mechs. List some that I could potentially use

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Twilight> Staff
Rarity> Rapier
Applejack> Revolver/shotgun
Fluttershy> Whip
Pinkie Pie> Flailing mace that looks like a wrecking ball
Rianbow Dash> Spear
Sunset> Katana

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Not bad choices