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.

Tropes used in Little Fighter 2 include:

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.
Nintendo Hard: Stage Mode is fairly reasonable...until you get to stage 4.
Playing with Fire: Firen. Firzen gets it also.
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.
Shotoclone: Davis and Dennis are basically Ryu with his abilities divided between two different characters.
- Hurricane Kick: Dennis has one.
- 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".
Smurfette Principle: Jan is the only female character in the game.
Super-Deformed: All the characters.