User:SiFi

=Alfredo=

Alfredo, also known as "Blue Mario" or "The Third Mario Brother", is the little-known brother of Mario and Luigi. Unlike most obscure Mario characters, he doesn't have an insane cult following, but he has been known to appear where least expected.

Donkey Kong
Alfredo wasn't present in the arcade or NES version of Donkey Kong. As a matter of fact, he wasn't present in most versions. But he did appear in the Intellivision version of the game, presumably because Mario didn't want to appear on such a cruddy console.

He was also in the Donkey Kong board game, but that's going into the deepest depths of obscurity.

Donkey Kong Jr.
Pretty much the same deal as in Donkey Kong here, except now Alfredo's even bluer!

Mario Bros.
No, Alfredo didn't appear in this game. Not even in the worst of ports. He did, however, appear on the boxart for the NES version of the game.

Oh, and he was also in the Game Boy Advance remake.

Super Mario World
Alfredo doesn't make a direct appearance in Super Mario World, but he is referenced. Once the player beats the Special World, the blue Koopa Troopas wear Alfredo masks.

Super Mario Sunshine
Alfredo had a very blink-and-you'll-miss-it cameo in this game, despite playing such a large role in the story. In this game, Alfredo becomes fed up with his obscurity and decides to frame Bowser Jr. for framing Mario by defacing all of Isle Delfino. In this game, he's bluer than ever before.

Alfredo appears like this many more times, but whenever he does, Nintendo screws up and calls him Shadow Mario or Cosmic Mario. So go there for more details.

DIC Cartoons
I can't guarantee that Alfredo was in any of these shows, but it wouldn't surprise me if one of the animators screwed up and painted Mario entirely blue, thus making him resemble Alfredo.

Mario Tennis series
In the Nintendo 64 version of Mario Tennis, Mario serves as the referee. But if Mario's already playing, then Alfredo is the referee instead.

Super Smash Bros. series
Alfredo appears in this game as an alternate costume for Luigi.

Mario Paint

 * Step 1: Draw Mario.
 * Step B: Paint him blue. Congratulations! You've unlocked the super-secret "Alfredo Mode"!

Action 52
In this abomination, Alfredo finally got his own game! It was called Alfredo in the Fettuc, but nobody knows Jack about it. Not even Jack himself.

Trivia

 * I did not make any of these appearances up.
 * Alfredo will return in: Every Mario game for Virtual Boy: Blue edition!
 * Sometimes he hangs out with Yellow Mario.

=Yellow Mario=

Not to be confused with Wario.

Yellow Mario is yellow. He's also so two-dimensional that Nintendo didn't even bother giving him a name, let alone an official relation to the Mario Bros..

Donkey Kong
Yellow Mario first appeared in the Donkey Kong board game. And that's about it.

Mario Bros.
Because Alfredo was busy, Yellow Mario was forced to star in the ZX Spectrum version of Mario Bros.. His presence was so sudden it turned everything else in the game yellow.

Oh, and he was also in the Game Boy Advance remake.

Super Mario World
Yellow Mario doesn't make a direct appearance in Super Mario World, but he is referenced. Once the player beats the Special World, the yellow Koopa Troopas wear Yellow Mario masks.

DIC Cartoons
I can't guarantee that Yellow Mario was in any of these shows, but it wouldn't surprise me if one of the animators screwed up and painted Mario entirely yellow, thus making him resemble Yellow Mario.

Mario Paint

 * Step 1: Draw Mario.
 * Step B: Paint him yellow. Congratulations! You've unlocked the super-secret "Yellow Mario Mode"!

Donkey Kong: Jungle Fever
Okay, I may have made this one up, but good luck proving that.

Trivia

 * Yellow Mario will return in: Every Mario game for Virtual Boy: Yellow edition!
 * Sometimes he hangs out with Alfredo.