I finally got Cat Clan Heroes' true form after beating Growing Epic stage for Epic seed. Yea, Cat Clan Heroes requires an Epic seed to unlock their true form. They got new ability which is targeting relic.
Besides, he got double HP and +1s weaken duration.
"Reflected Laughter" Kirby Triple Deluxe Remix by NoteBlock https://youtu.be/OOWyEWBkuhk
Satori Maiden ~ 3rd Eye (no link available since I got this from another video game)