Testing if Host Mechanics Glitches still exist

Challenge someone to a battle in-game
Make a note of who has the left trainer card. This is the host.
Send out two Pokemon each (doubles).
KO any Pokemon but the host's left Pokemon (left slot from the perspective of the host player). Now one player only has 1 Pokemon remaining.
Use Sucker Punch on the host's left Pokemon (and have that Pokemon use some normal attacking move). If it fails, the glitch still exists. Otherwise, it's fixed (at least in part).