The Trix mascot is a white anthropomorphic rabbit that is always seen trying to trick kids so it can get their cereal, but ultimately fails following the slogan “Trix are for kids”. It technically never does anything “wrong” per se, so it is a suitable mascot for a kid’s cereal. The focus of the ad is the cereal’s flavours.
The mascot character for Kellogg’s Coco Pops is Coco, a monkey wearing a blue hat and a white t-shirt with the word “coco” printed on the front. The key selling point of the advert is that the chocolate in the cereal affects the milk as well, effectively doubling as a breakfast and a source of chocolate milk. Another selling point is the activities on the back of the box, a staple feature of most kids cereal products. The activities tie in heavily with the story in the ads, so when a child that has been drawn into the story do the activity they feel that they are contributing to the characters.
Weetabix doesn’t have a mascot character, but still advertises successfully to children. This ad in particular plays on Weetabix’s USP of wholegrain products giving people enough energy for the day, and presents it to kids through the use of professional dancing. The main character in this ad, the dancing girl, is able to perform an impressive dance after eating just a bit. This suggests to the target audience that such feats are capable when eating Weetabix.