Boss Battle

A Boss Battle is a term used in many Mario games where it usually means someone is fighting a much tougher enemy. The first sign of Boss Battles are usually indicated by the change of scenery or, more commonly, the change of theme music.

Mini Boss Battle
The Mini Boss Battle is described as a stronger fight with an enemy but not strong enough to be a boss. The Paper Mario series is known for it's Mini Boss fights before the Chapter's boss.

Final Boss Battle
The Final Boss Battle, as the name says, is usually a fight with the final boss of the game. The Final Boss is stronger than any other of the game's bosses and it usually involves Mario or some other character using all of their skills to defeat that opponent. Bowser currently holds the record for being the most faught Final Boss in the series (including as different forms such as Shrowser and Dreamy Bowser).

Donkey Kong
The only Boss Battle in this game is with the final boss Donkey Kong. Mario must run all over the pegs to defeat him. The stage where Donkey Kong is faught on is 100m.

Super Mario Bros. series
In Super Mario Bros., the bosses in this game are mainly False Bowsers while Bowser, himself, is the final boss.