...get the medal. Am I too late? I didn't have internet for two days. :/

Did you defeat it 10 times?

No. I'm dumb. hangs head and hides

No you're not. It wasn't made clear. You defeat it 10 times and then you get a medal in your inventory. You use it to unlock the next one and beat it 10 times for the medal .etc .etc.

I figured that out now, lol. I'm on the third one and probably ending here because I'm a lazy trainer. Thanks for your help!!