Super Mario Bros. 3 Characters & Koopalings
The heroes, their allies, all seven Koopalings and the two other bosses, with links to each fight.
Heroes

Mario
Player 1. Runs, jumps and changes form with power-ups to recover the kings’ wands and rescue the Princess.

Luigi
Player 2 in the alternating two-player game, with the same moves as Mario.
Allies

Princess Toadstool
Later known as Princess Peach. Sends a letter and an item after each world, until Bowser kidnaps her.

Toad
Runs the Toad Houses and the Spade Panel games, and asks Mario to recover each stolen wand.
Koopalings

Larry Koopa
World 1 airship boss. Fires wand shots and hides in his shell after each stomp.
Boss guide →

Morton Koopa Jr.
World 2 airship boss. Slower than Larry but shoots more often.
Boss guide →

Wendy O. Koopa
World 3 airship boss. Her candy rings bounce around the whole room.
Boss guide →

Iggy Koopa
World 4 airship boss. Fast, with frequent wand shots on an uneven floor.
Boss guide →

Roy Koopa
World 5 airship boss. His landing shakes the floor and stuns a grounded Mario.
Boss guide →

Lemmy Koopa
World 6 airship boss. Balances on a ball and bounces more balls at you.
Boss guide →

Ludwig von Koopa
World 7 airship boss. Rapid shots, stunning landings and a fast shell charge.
Boss guide →
Bosses

Boom Boom
Fortress guardian. Three head stomps beat him; later fights add jumps, flight and a conveyor floor.
Boss guide →

Bowser
Final boss in Dark Land. Lure his ground pounds onto one column until he falls through the floor.
Boss guide →
Sources & picture credits
Guide text is original retrogameindex writing. Maps, screenshots, sprites and artwork © Nintendo; local copies archived from Super Mario Wiki file pages (listed on the image gallery).