I will assume you are talking WDW since the OP mentioned the GF???
These are what we did with my 3 yo son just in Feb...I'm looking for suggestions for our Christmas trip as well cuz he loves his characters.
Chef Mickey dinner- Mickey, Minnie, Donald, Goofy, Pluto
'Ohana- Lilo, Stitch, Mickey, Pluto
Tusker House- Donald, Daisy, Goofy, Mickey (maybe Pluto, I can't remember)
Cindy's Royal Table- Cindy, Snow White, Ariel, Aurora, Belle
Crystal Palace- Pooh, Tigger, Piglet, Eeyore, and Rabbit made an appearance outside to people in line
Garden Grill- Chip, Dale, Pluto, Mickey
Hollywood & Vine- Special Agent Oso, Handy Manny, Jake the pirate, and June from Little Einstiens
Ok, I very well could be missing one that we went to.
There are also princesses at the Akshus or something like that in Norway that I'm thikning about for next time (my son is a ladies man with the princesses, he is in love with Belle!). Not really sure of anything else. I'm pretty sure there is one place that has Timon & Pumba, 1900 also has Mary Poppins (different meal than Cindy) I believe or maybe I have the restaurant wrong! I really wish they'd add more of the non-traditional characters to meals like Toy Story, Cars (just kiddin'), Lion King, Nemo, Bolt (ha couldn't you see a dog running through the restaurant!).