Nintendo cameos

[Naesala]

anyone notice and cameos of Nintendo characters in other series


the Mario pictures in Hyrule castle in OoT come to mind

[tacopill]

definitely link showing up in Super Mario RPG. 

[FireFly]

Mario and friends showing up in Kirby vs. Dedede battle.
Also, a whole lot of Great Cave Offensive treasures are references, many from previous Nintendo games.

[Naesala]

the Animal Crossing song Rockin K.K. is the same as the music when you fight the New Age Retro Hippie in Earthbound

[Gamefreak75]

Both of those are based off of Johnny B. Goode.

[Axiomist]

More props to that song, It's also being played on the spaceshuttle that's drifting out with the intention of aliens finding it. If they ever do, Louisiana will be the only state they know 

[DrSuperfox]

I remember Samus in Super Mario RPG. That, was weird.

[Metechar]

Fyer has a Banzai Bill drawing on his shirt's shoulder (Twilight Princess)
The enemy Anti-Kirby in Link's Awakening.
The Arwing and Blue Falcon in Hip-something's shop in the Barrel Volcano (SMRPG)

[KidIcarus]

Pit, Palutena, Donkey Kong, Mario, Samus, and Link appear in one of the endings for Tetris on NES.

[Naesala]

Donkey Kong Country Returns

[spoiler] one level you can see the first level from the first Donkey Kong, also Mr. Game and Watch[/spoiler]


Octoman from F-Zero shows up in Star Fox Command, and one character from F-zero is named James Mccloud and has the same outfit