As stated in previous conversations with people, Delinquent Cat is good at his job and that's it. It's not extraordinary like Paris Cat, Sanzo Cat, Octopus Cat, or Pizza Cat, it's just good at it's job. Even in it's true form it's just good at it's job, and to get it you need to beat all of SoL.
Freeze floating units (Relic in true form). Unlike Shaman cat he has area attack, but Shaman cat attacks faster, has more range, has a higher freezing chance, has a longer freeze, faster respawn time, cheaper cost, and faster tba. While Delinquent Cat has better attacking power, better cats exist for floating damage, or just damage in general.