Walden is a purple bear and one of Wubbzy's best friends from Wuzzleburg. He's very intelligent and knows much about science, books, art and other things.
Walden is also a travelling member of the FT Squad in The FT Squad's Adventures Series.
- Walden met Kyle the Otter in Kyle and Kaytlin's Adventures in Wow Wow Wubbzy: Wubb Idol. Walden knew Kaytlin beforehand in Kaytlin's Adventures in Wow Wow Wubbzy.
- Walden joined the FT Squad, along with Wubbzy, Daizy and Widget in The FT Squad's Adventures in Beauty and the Beast.
- Walden guest starred in The FT Squad's Adventures in My Little Pony: Friendship is Magic, and The FT Squad's Adventures in Circle of Life, and later will in The FT Squad's Adventures with Timon and Pumbaa, The FT Squad's Adventures With Phineas and Ferb, The FT Squad Rides on the Magic School Bus, and more to be revealed in the future.