Castle Mario

Castle Mario
Level ID	World 5-3
Game	A Koopa's Revenge II
Enemies	Toadlet (red type) Fireballs Dry Fossil Mallet Bros. Phinphin (green type) Sharky the Whale Plooper (green and red types) Spike Bar Mini Mario Beebee Firebar Piranha Shroom (green and red types) Baby Bros.
Powerups	All powerups (from a Roulette Block)
Boss	Mario and Monstario Dan and Zangief (if the player didn't rescue any Koopalings and didn't activate any switches)
How To Unlock	Beat the level Mario's Doomship normally or find the secret exit in Retro

Not to be confused with Mario's Castle from A Koopa's Revenge.

Castle Mario is the final level of A Koopa's Revenge 2, or AKR2 for short.