Another dropped challenge... sadface
Regardless, Challenge Accepted! I'll give ya Sudowoodo and Xatu.
I still remember on my first GSC playthrough (on Gold), I never did figure out where to find Natu and Xatu; mainly because I never battled a trainer that had a Natu... Was ecstatic to finally have one for my team when I played through my Silver immediately afterwards.
Er, nostalgia, I'll be resuming my Soul Silver challenge tonight.