Little Fighter 2

A freeware Fighting Game created by Marti Wong and Starsky Wong, featuring Super-Deformed characters beating the crap out of each other. Quite fast-paced, supports a large number of fighters on the screen at the same time, and features surprisingly good enemy AI for such a simple-looking game.

Has a large number of play modes, including simple 1 vs 1, a "story" mode where you fight your way through multiple stages full of lesser enemies, and a tournament mode.

Little Fighter 2 provides examples of:

 * Anime Hair - some of the characters have very Dragonball Z-like hairstyles.
 * Beam-O-War - can happen when two fighters rapid-fire ranged attacks at each other.
 * Big Bad - Julian.
 * Boss Game: If you consider the normal characters that pop-up in Stage Mode to be mid-bosses, then it slowly becomes one, until every other wave is a mid-boss wave with 4 mid-bosses.
 * Defeat Means Friendship - in the story mode, some opponents join your team after you beat them.
 * Fixed-Floor Fighting - the games have a long stretch of land, but it's all one plane.
 * Fusion Dance - Firen and Freeze can fuse to become Firzen.
 * Hailfire Peaks - Queen's Island: the stage with Firzen as the sub-boss.
 * Hyperactive Metabolism - drinking milk heals injuries in a few seconds.
 * An Ice Person - Freeze. Firzen gets it also.
 * Shotoclone - Davis and Dennis are basically Ryu with his abilities divided between two different characters.
 * Kamehame Hadouken - Davis can rapid-fire them while Dennis can fire them at a slower rate or summon one that homes in on enemies. Firzen's "Firzen Cannon" is pretty much a Yellow Kamehameha.
 * Shoryuken - Davis' "Dragon Punch".
 * Hurricane Kick - Dennis has one.
 * Nintendo Hard: Stage Mode is fairly reasonable...until you get to stage 4.
 * Respawning Enemies: In Stage Mode, if there are any mid-bosses (basically normal enemy non-mook characters) or bosses on the field, the mooks will respawn endlessly until they're taken out. Yes, this includes healers, too.
 * Playing With Fire - Firen. Firzen gets it also.
 * Smurfette Principle - Jan is the only female character in the game.
 * Super-Deformed - all the characters.