You cant,you can just play on one device.If your playing on your phone then phone it is.Read the instruction on the restore code.
8 tries? had like 30-35 tries and not a single legendary…
mate, dont loose hope! im quoating my previous reply post to encourage to keep rerolling.
I spent an entire day rerolling for penguini and got him after like 10 hours on my 2nd account… I’ve beaten the full offline story and could probably easily go ahead n beat the missions online if tickets were not stopping me.
it’s truely worth it
Is it best to have penguini in last 4 monsters with some healers? Where is he in your line up?
I’m using him at the front cause I’ve ultra-evolved to Godfeather. he can retreat when he needs to - if you still have Don Penguini then put him at the back together with a few stun bombers & heal all mons that can kill themselves so Penguini can start using Last Bite…
However when the lineup permits it I like to use Godfeather as a one man team 
Thanks for the info mate