Here are my ideas. I've decided to repost the ones I thought of a while back, as well as come up with some new ones for already mentioned characters. I've also made new character entries. Some ideas also revolve around being able to choose any character, or choose from a limited set of characters.
[COLLAPSE="Samus"]-Metroid Rampage: 8 metroids are on the loose. The metroids will be the assist trophy form, but for this match, they can be harmed.
-Princess Samus!?: Seeing her only for her blonde hair and blue eyes, Bowser thinks that Samus is another princess. Little does he know... (ZS Samus)[/COLLAPSE]
[COLLAPSE="Toad"]-The Mushroom Retainer: Bowser's attacking, and Mario's nowhere to be found! Its up to Toad to protect Peach.
-Lost in the crowd: Toad and Yoshi team up to fight a group of Toads and Yoshis. [/COLLAPSE]
[COLLAPSE="Little Mac"]Donkey Kong, Title Defense: DK wants a rematch against Little Mac.[/COLLAPSE]
[COLLAPSE="Pokemon Trainer"]-Tactical Trainer: You must battle 3 starter pokemon who can only be harmed by their type's weakness. Use your water type for the fire pokemon, fire for the grass, and Pikachu for the water type. You have 4 Pokemon, you're battling 3 (but 1 at a time) and you decide which pokemon you use by pressing a specific direction on the D-Pad in conjunction with B; however, DownB will cycle through the pokemon in a specific order.
Up Taunt+B will switch to the 3rd form
Right Taunt+B will be the 2nd form, Left Taunt+B will be Pikachu
Down Taunt+B will switch to the 1st form
*This has NOTHING to do with my multi-gen PT idea.
Pokemon Collector: Some people only want to have pokemon. Battle 4 pokeball pokemon one at a time (which spawn out of nowhere) and use a Trophy Stand to defeat each.[/COLLAPSE]
[COLLAPSE="Olimar"]-Puny Pikmin: An actual-sized Olimar and Pikmin must fight 3 smashers. Olimar will be under the Poison Mushroom's size effects, but his weight and reach won't be changed--only his size. [/COLLAPSE]
[COLLAPSE="Mario"]-Metal Mario vs Metal Wario: a 1 on 1 against Mario's metal alter ego. Wario is in his plumber outfit.
Metal Mario Madness: Mario must defeat a team of Metal Marios...ON HIS OWN. [/COLLAPSE]
[COLLAPSE="Multi-Character Ideas"]-Kings of the hill: Bowser, DeDeDe, and K.Rool are battling to prove their power. Choose one of these three and fight the other 2.
-New Super Mario Bros. 2: Play as Mario, Peach, Luigi, or Toad to fight Bowser. Bowser has been resized to be larger and has a greater flinch resistance (he can still flinch though). Whoever you pick out of these 4, the other 3 will be CPU allies.
-Princess Peril: Play as Mario or Luigi and protect Peach from Bowser and Bowser Jr.
-Sidekick Showdown: Luigi, Diddy, Bowser Jr., and Falco. Pick a fighter and see who will be victorious.
-The revenge: Your least picked character is tired of being left out of the fray, and has teamed up with 2 other neglected fighters. Now, your most played character must fight them
-Team Green: Luigi, Link and K.Rool take on the world.[/COLLAPSE]
[COLLAPSE="Peach"]-Super Princess Peach: Bowser's kidnapped Mario...again?! Is this gonna be a regular thing? [/COLLAPSE]
[COLLAPSE="Captain Falcon"]-Collateral Damage: Destroy all the racecars on the F-Zero stage before time runs out.[/COLLAPSE]
[COLLAPSE="Bowser"]-How do YOU like it?!: Already enemies, K.Rool learns that Bowser once stole DK's bananas. That's HIS job! Now, K.Rool has responded by kidnapping Peach...from Bowser himself. Steal her back before Mario gets involved.
-The Tables Have Turned: Tired of Bowser's routine abductions, the Mario Bros. have decided to kidnap Bowser's favorite child. Can the King save his kid?[/COLLAPSE]
[COLLAPSE="Wario"]-The Toad Brigand: A thieving Toad stole Wario's cash! Beat him like he owes you money![/COLLAPSE]
[COLLAPSE="Donkey Kong"]3DKC: The three DK's set out to face the Kremling King.
Stolen Food: DeDeDe has stolen the food from Kirby's Dreamland and Donkey Kong's Island. Now Kirby and DK join forces to stop him.[/COLLAPSE]
[COLLAPSE="Bowser Jr."]Vandalism: Bowser Jr. has decided to paint Peach's castle in light of past problems. Cover the entire stage in paint before someone stops you.[/COLLAPSE]
And here's my ideas for any character:
Hands of Steel: The etheral hands of Creation and Destruction have been turned into metallic beings. Can you defeat the two now that they've become stronger and more durable?Master and Crazy Hand need more moves. There's an infinite amount of gestures that 2 hands can do together, let alone by themselves, and Brawl didn't introduce anything new.
Donkey Kong, Jr.: Diddy's buddy and Bowser's son have teamed up to cause chaos. Stop them before they vandalize all of the level's destructible environments. (Any character, but you get more bonuses for using Diddy or Bowser.)
Metallic Might: Using permanent power-ups from Super Mario 64 and Donkey Kong Country Returns, the Metal Mario Bros. and the Golden DKs are having a team battle! Its up to you to stop them and be the only one to KO a character.
*There are 5 characters: 4 will be CPUs and 1 will be the player. The CPU players will attack each other provided they're on opposing teams, leaving the player as a largely ignored entity. The goal is to be the only one to KO the other fighters; if not you fail. Your opponents will be metallic, and although DK and Diddy have a golden shine, they will have all the SSB properties of being metal.
You must be careful in how you complete this. If you KO all the members of one team first, then the remaining team will attack you, because you're the only one left to fight. Also, one of the rewards for beating this match is the option to have Golden Kong appearances for DK and Diddy whenever they're metallic. Its entirely cosmetic, and optional.