Super Smash Bros. Brawl/Multi-Man Brawl

The multi-man brawl gives you 6 different battles:
 * 1) 10-Man Brawl (battle against 10 alloys).
 * 2) 100-Man Brawl (battle against 100 alloys).
 * 3) 3-Minute Brawl (try to survive 3 minutes of brawl).
 * 4) 15-Minute Brawl (try to survive 15 minutes of brawl).
 * 5) Endless Brawl (battle against unlimited alloys until you quit or you are defeated).
 * 6) Cruel Brawl (battle against very difficult alloys).

In this, game the enemies to battle against in the multi-man brawl will be the Fighting Alloy Team. The main four come in different colors and sizes that mimic normal characters:
 * 1) The Red Alloy: similar to Captain Falcon (shape and movement).
 * 2) The Blue Alloy: similar to Zero Suit Samus (shape and aerial attacks).
 * 3) The Yellow Alloy: similar to Mario (does a rotational flip when jumping).
 * 4) The Green Alloy: similar to Kirby (jumps multiple times and has a similar aerial attack).
 * 5) There's also a more intelligent character, similar to Mario and the yellow alloy, but it only appears during certain events: one is randomly thrown in with every 25 or 30 alloys, the final enemy in 10-Man Brawl, and the final enemy in 100-Man Brawl.  Note that these are more efficient and durable fighters than the alloys.

Hint: you don't actually need to KO them; they just need to fall off the stage in order for it to count, be it friendly fire from another CPU or just the odd occurrence of them jumping off the stage.

100-Man Brawl
This challenge doesn't seem very hard at first because all the enemies can be killed with a well-placed smash, but once you get to less than 25 alloys left, it becomes a real challenge.

The beam sword is a very effective item in 100-Man Brawl because of it's long range and powerful smash attack. Pokéballs and Assist Trophies are also very useful, unless you get a Pokémon like Goldeen, or Assist Trophies like Nintendogs or Resetti. Fans are also excellent choices, but work better if thrown; enemies pop straight up into the air at high speeds, even if it's the last 25 — stand under the left or right platform and throw it straight up, then watch as the Alloys fly off-screen the second they step off their platforms. Another very good item to use is the bumper — stand below the right or left platform and throw it straight up, and it will get stuck right where alloys spawn, creating instant kills very easily.

Beating this with every character yields a Blue Alloy trophy; there are also prizes for beating it in less than four minutes and less than three minutes and thirty seconds.

15 Minute Brawl
If you use two Lucario's, you set up your characters to charge their shot in a way that juggles the enemy for extremely long periods of time. Simply have one Lucario charge up its energy, then have the other move on top of him but face the other direction and charge up its energy. The crossing paths will juggle the enemies between the two directions. You'll still need to watch the game in case bomb-ombs appear, but you shouldn't have to do much other work than reset the dual charge stance.
 * Using Lucario Co-op