The phrase comes from the Super Smash Bros series, where Nintendo reveals a new playable fighter with a dramatic trailer ending in that character joins the battle. Fans turned those reveal moments into a reusable meme format, cutting the music and announcement style into videos far beyond gaming. It spread through YouTube edits, TikTok introductions and gaming montages, where the familiar fanfare instantly frames any arrival as epic. Its continued use comes from that shared recognition: viewers immediately understand that someone new, important or unexpected has just entered the scene.