I was told that Satan's Z Soul can be obtained with Satan's tiled secret, so I challenged.
Satan's tile breaking challenge page
On the screen for selecting the number of tiles for Satan, hover over the tile in front of Mr. Satan, and click because it glows golden.
You can challenge the secret mode. It is 30 sheets, but is it about 25?
Earn the Secret Dragon Code when you complete it. Satan's Z Soul is available.
It's a lottery, but with skill 1 all HP 300 of all allies
HP is 1100+ with link ability. Link group is alien and hero