Utter garbage. This is stupid bullshit, the rare one is just impossible as a new player. Every time I try to do it i get my first set of attacks then when I go to attack it again it just loads another screen saying it's been defeated already and I get no credit for being part of the battle. I'm on level 6/7 ones and now I'm not even getting credit for the ones I discover! On 3/20 even though I've discovered 6 and have been in battle with at least 15 of them.
I read the earlier comment about having to see it die so keep attacking and don't skip but I can't because its already dead so it loads the next screen whenever I go to attack after the first free one.

Great job developers! Fix your damn system.