After an unholy amount of walking over the past like 9 months ish, unlocked all but one route on the Pokewalker (last one requires use of GTS)

I'm so glad it's over. I was able to level up a Pikachu 50 times, and a mantyke 26 times. I used other things too, but those were my go-to's. I can unlock the GTS one via the DNS trick IIRC.