Bluey the Walrus is a large blue walrus and one of the fastest racers on Timber's Island.
During the events of Diddy Kong Racing, Bluey ended up being hypnotized by an evil pig named Wizpig who turned Bluey into one of his slaves. Bluey was also intrusted into guarding one of the pieces of Wizpig's amulet.
Bluey will only allow racers to race him if they managed to beat all the challenges in his area, Snowflake Mountain. If someone manages to beat all of Bluey's trials, that racer will be given the "privilege" of racing Bluey. The race against Bluey is on a downhill mountain. If Bluey is beaten in a race, he will temporarily be freed of Wizpig's brainwashing. In this brief moment of freedom, Bluey will allow the victor of his race to partake in Snowflake Mountain's Silver Coin challenges.
If all of Snowflake Mountains Silver Coin challenges are beaten, then the player will gain the chance to re-race Bluey. This time Bluey is twice as fast, making his race that much harder. After Bluey is beaten for the second time, he will be relinquished from Wizpig's control. As thanks for freeing him, Bluey will give his opponent a piece of the Wizpig Amulet that he was guarding. Bluey also appears in Diddy Kong Racing's end-of-game victory celebration.
Bluey also appears in the Nintendo DS remake, Diddy Kong Racing DS. He sounds more like an elderly leader in this game, and is much faster in both races.