A character's walk is one of the best indicators of their personality, current state of mind, and physical condition. A walk cycle clues us into whether or not they're a hero or villain, young or old, rich or poor, being sneaky or being kind, and so on.
Search online for a walk cycle or clip of walking for one of your favorite animated characters. You DO NOT need to find original walk cycles of famous characters. In fact, it's better if you don't, but, instead, find other student work interpreting how that character might walk.
For example, you could find a "Pink Panther" walk cycle test here: https://vimeo.com/113077343 or a walk cycle test of "Finn from Adventure Time" here: https://www.skillshare.com/classes/design/Simple-Character-Animation/1750772942/projects/37905