One of the few new items to Ultimate, this one is a Smash Bros. universe original, so it didn't show up in any other Nintendo game. It is one of my favorite items in the game.
While you might think it's just a "echo" of the Ray Gun, it's certainly a bit different.
Your range is a bit shorter, but your power is much higher. When a foe gets hit, it's not just some petty damage.
It's even strong enough to block certain projectiles especially non-items.