Walden is a quirky intellectual who finds great wisdom in everything from ancient philosophy to tarot card readings. He has a passionate curiosity about everything and a unique way of looking at the world. Every time he faces a challenge, he tells himself to "think, think, think!"
Walden is a good friend, but sometimes his secret fears make him want to drop out of adventures. Walden is a science type and is mostly willing to help out. He is more careful than others, but is overall a nice and noble bear. According to the title song, "he knows about science and books and art." However, most episodes show him helping by reading his books and using science; his art skills are not shown much.
Part of his extensive knowledge includes the ability to communicate with various animals. For example, in the episode O Figgety-Fig Tree, Walden talks with a glowfly to gather it's glowfly friends to act as lights on the tree.
Walden has a habit of repeating words three times. Other than occasionally using Wubbzy's "wow wow wow", he often says "yes yes yes" when affirming something, "no no no" when disagreeing or warning, and "my my my" when exclaiming amazement.
Walden is purple with black glasses that have blue lenses. He has a red shirt with white polka dots and wears a turquoise tie.
Walden has appeared in most episodes of Wow! Wow! Wubbzy! Walden made his first appearance in A Tale of Tails. Walden's last appearance was in Woozy Walden.
- Walden's theme is most likely to be "Lean on me" because, the first few verses of the song can be heard in his scenes.