If my bench is full and I use Luvdisc's "Even Game" attack, does that allow me to exceed my normal bench size like Sky Field does?
Sorry, but no. You can't put more Pokemon on your bench than you are allowed to.
Source: Celestial Storm FAQ (2018-07-20), TPCi Rules Team (2018-08-02)

Relevant cards

Note: All applicable cards may not be listed below.
SM7_44