Trainers » Guzma
If I use Guzma and choose my opponent's Primal Groudon-EX that has the "Omega Barrier" Ancient Trait, do I still get to switch my own Pokemon?
Since Omega Barrier prevents the first effect of Guzma, you do not get to switch your Pokemon.
Source: TPCi Rules Team (2017-08-31)

Relevant cards

Note: All applicable cards may not be listed below.
SM3_115
SM3_115a
SM3_115a
SM3_143
SMA_SV84
SMA_SV84