A strange pairing of themes emerged from today's DSiWare and WiiWare selections: racing and dogs. Need for Speed Nitro-X is out just in time to promote Hot Pursuit, accompanied by two other racing games of various disciplines. Meanwhile, two games about training dogs are also available this week.
And yes, there is crossover between the two motifs, in the form of WiiWare's Derby Dogs. Even Go Fetch! on DSiWare is kind of a racing game, now that we think about it -- it involves dogs running at top speed to get ahead of their opponent, a ball.