This game hates me!

ursa is fun but not worth the dust. i'd wait for higher level lax imo.

Snorlax might be worth holding onto. It at least gives you an extra Snorlax you can walk with while any other Snorlax are sitting in gyms.

Unless the Ursaring has phenomenal IVs and/or you collect low level evolved pokemon, I don't see any reason to hold onto a level 2 Ursaring even if it does have the best defensive moveset.