Okay, but what if Groovifying a card is actually symbolizing how a character is awoken from their slumber that Malleus put them on? Groovifying in other games literally is awakening a card. You know how thorns sprouted all over NRC and stuff and shrouded the map and the people in them after he put them to sleep? In Groovifying, we remove these thorns (see how the thorns part to reveal the new art of a card) which essentially represents how they've woken up.
Edit (thanks to a repost): the thing to awaken the card is called Awakening Perfume (I totally forgot about this, lol).