Brother Bear - Nemo makes an appearance when Kenai disrupts the salmon fishing.
Aladdin - The Beast is one of Sultan's toys
The Hunchback Of Notre Dame - Aladdin’s Magic Carpet, Belle from Beauty and the Beast, and Pumbaa from The Lion King, are seen on the street surrounding Notre Dame during the “Out There” scene.
101 Dalmations - Peg from Lady and the Tramp is in the window of Percy’s Pet Shop
The Great Mouse Detective - Bill the Lizard, from Alice In Wonderland, is part of Ratigan’s gang.
Oliver & Company - Yep, that's Jock, Peg, and Trusty from Lady & The Tramp
The Black Cauldron - When Taran, Princess Eilonwy, and Fflewddur Fflam discover the Fair Folk and their underground kingdom, Tinkerbell appears among the fairies.
Oliver & Company - Ratigan, from The Great Mouse Detective, and Scooby Doo are hidden among the photos in the “Perfect Isn’t Easy” scene.
Hercules - the slain lion is Scar from The Lion King.
The Princess and the Frog - that's Aladdin's magic carpet in the opening scene.
Tangled - look closely because that's Pinocchio up in the rafters during the I've Got A Dream scene.
Lilo & Stitch - don't miss the Dumbo toy sitting there.
The Princess and the Frog - Louis pulls on some swamp grass and imitates Madam Mim from The Sword and the Stone.
Tangled - 3 classic Disney books appear in this one. Sleeping Beauty, Little Mermaid, and Beauty and the Beast
Oliver & Company - Princess Aurora in the background
The Princess and the Frog - King Triton appears as the Mardi Gras float.
Tarzan - That's Mrs. Potts and Chip from Beauty and the Beast
The Rescuers - Bambi and his mother :)
Lilo & Stitch - a Mulan poster shows up in the background
Little Mermaid - Hey look, it's Goofy!
Beauty and the Beast - When Maurice and Felipe are lost in the woods, the road signs say Valencia and Anaheim. Disney Land is in Anaheim and Valencia is where many Disney artists study (California Institute of Technology)
Treasure Planet - a doll of Stitch on the shelf
The Fox and the Hound - Wart (in squirrel form) from The Sword in the Stone makes a cameo.
Lilo & Stitch - The ball from Pixar’s Luxo Jr. can be seen in the background.
Sleepy Beauty's spinning wheel can be found in Rapunzel's tower in Tangled.
Flynn Rider and Rapunzel make an appearance at Elsa's coronation in Frozen.
And it seems Tiana and Naveen were in attendance as well.
Mike Wazowski from Monsters, Inc. appears as a small figure in Frozen.
Two Tangled characters (Maximus and Vladimir) show up in Wreck-It-Ralph.
Hans from Frozen shows up in a wanted poster during Big Hero 6 (an upcoming movie).
A little Mickey Mouse doll also appears in Frozen.
A copy of the book Rapunzel is in Charlotte’s room in The Princess and the Frog.
A shadow in The Princess And The Frog looks a lot like Jack from The Nightmare Before Christmas...
Tick-Tock, the crocodile from Peter Pan, is backstage during The Goofy Movie concert.
Mickey Mouse can be found in a crowd during A Goofy Movie.
Dumbo shows up as a bubble toy in The Great Mouse Detective.
Jock, from Lady and the Tramp, helps the pups during 101 Dalmatians.
Pongo shows up during a song in Oliver & Company.
Don Knotts’ Henry Limpet fish character (from The Incredible Mr. Limpet) shows up during The Little Mermaid.
Kermit the Frog makes an appearance during The Little Mermaid.
There's a Mulan restaurant in Lilo & Stitch.
In The Hunchback of Notre Dame, Pumbaa makes an appearance as a gargoyle.
Is that Bambi's mom... or Shere Kahn's prey in the Jungle Book?
Wreck-It Ralph references The Paperman, an award-winning animated short, during a villain group scene.
Posters for The Jungle Book and Toy Story 2 show up in the background of Meet The Robinsons.