The Star Rod Spirit Battle is an Ace-Type spirit Battle in the Spirits Mode in Super Smash Bros. Ultimate that pits the player character against 4 Kirby AIs. It
Max Brass Spirit Battle (Super Smash Bros. Ultimate) - Atrocious
Star Rod, Smashpedia
Dr. Mario (SSBU) - SmashWiki, the Super Smash Bros. wiki
Nightmare - WiKirby: it's a wiki, about Kirby!
Star Rod - WiKirby: it's a wiki, about Kirby!
Princess Peach - Super Mario Wiki, the Mario encyclopedia
If we give Kirby everything he has, can he solo Dragon Ball Super
Star Rod (Kirby) - Super Mario Wiki, the Mario encyclopedia
Super Smash Bros. Swansong, Fantendo - Game Ideas & More
Star Rod, Kirby Wiki