no.
you cant
you cant
you have to pick female for your gender
Battle him a second time.
you need to have explorers of the sky and answer the questions correctly to be riolu
well sadly you can't start the game with one (believe me I've tried forever to get a girl riolu) but you can occasionally find one in crystal cave from B4F-B8F
in the game you have to take the personality test if you get it right or your personality is riolu you get to be him
You give them lots of Gummies.
Yes you can recruit riolu in crystal crossing or crystal cave
I started with Riolu and went to the Marine Resort (18F). I'm gonna say no? Is there any glitches in your game? Does anything freeze? That could be the problem or somewhat. Sorry for this, I usually know lots of stuff about Sky..But I could answer any of your other questions. ~NexusRiolu~
riolu'
In all Pokemon games, Riolu can learn dig with the TM Dig. If you have the TM Riolu should be able to learn it.