Walker is the only sim who give's a dispatch mission that is impossible to fail. Those missions are Deploy! and One More Time.
Walker has a slight resemblance to Ewan and Johnny.
Walker makes a reference in the DS version of MySims Galaxy when he talks about a weapons delivery truck after investigating a pizza parlor. This is a reference to what he says in his dispatch mission, Sewer Search, in MySims Agents.
Also in MySims Galaxy, he is the only person to have the same mission in both the Wii and DS version.
