The final boss fights against Magolor EX and Magolor Soul of extra mode in Kirby's Return to Dreamland Deluxe for Nintendo Switch. Clearing extra mode unlocks the true arena.
Sadly had to die on purpose a few times because the soul boss battle took too long with Magolor teleporting at very inconvenient times.
This is a 2023 HD remake of Kirby's Aventure Wii, released in 2011.
⊵ Magolor EX + Soul boss fights
KRTD DX Gameplay playlist: https://youtube.com/playlist?list=PLtA3RKX1_Yx0ePvOBggrnMMk5MBK2h6Gj