Nice to see old Horton among them. And Pumbaa. And Eeyore. Those loveable old dears. It be sweeter if the Ice Age, Tarzan, Brother Bear, Avartar: Last Airbender, Pokemon, Digimon, Super Robot Monkey Team Hyperforce, Lylo and Stitch, Lorax, Dumbo, Raya and the Last Dragon, Moanna, and more were feature as well.

Where is the road runner?

Fluttershy happily squeal: “It’s a miracle! We having new friends from the other universe! Was it wonderful, Discord?”  
Discord: “Yeah! This is the best celebration for everyone!”  
Bugs Bunny: “I’ll tell you one thing, doc: it’s fun and magic.”  
Wile E. Coyote: “Yes. It will be amazing.”  
Mickey Mouse: “Oh boy! I love this celebration!”  
The Cat in the Hat: “I think making new friends was a wonderful idea.”  
Winnie the Pooh: “We’re always happy to have fun with all of you. Right, Applejack?”  
Applejack: Right, Pooh bear. I was glad to all of you come to visit in our world.”  
Scootaloo: “This is so awesome! I always want to meet you guys!”  
Timon: “Hakuna Matata, kid. We will do our best to get to know each other.”

As a chance when the CMC especially apple bloom not just earned their cutie marks when she was turned into an alicorn was to have the mane six and some famous cartoon characters come to ponyville to witness the celebration.