I don't actually know, they aren't my pictures. The Wobbuffet tends to be around 500-600 CP and you get 5k XP for defeating them. Apparently the only soloable one is Pikachu.
Wobbuffet is supposed to be Blissey Lite (insane HP).
Pikachu is Somewhere in between Tier 1 and 2 (can be soloed).
Piloswine is like a Lapras (don't solo!)
Ursaring is similar to a snorlax in term of attack power, but with the overall difficulty of Machamp.
Once again, I haven't battled them myself but these are his opinions on them. I am 8000 miles away in Germany, so couldn't battle them if I wanted to