I guess the real question is: why does Dogecoin use Scrypt? Litecoin used it to avoid [competing for miners against Bitcoin](https://bitcointalk.org/index.php?topic=47417.0), but before that Tenebrix simply said they used it ["to resist creation of efficient GPU, FPGA and even ASIC implementations"](https://bitcointalk.org/index.php?topic=45667.0) and to be a CPU-only coin. Dogecoin probably just used Scrypt because every clone-coin did.

Given the context, citing Tenebrix's reasoning for using Scrypt is probably more accurate than citing wikipedia's assessment of Scrypt, but they're not radically different either.