Emolga with a Grass energy attached is poisoned and uses its "Call For Family" attack to get Virizion EX with "Verdant Wind" ability. Does it take poison damage or not?
No, because Virizion EX is in play before the end of the turn and Poison damage is taken between turns.
Source: TPCi Rules Team (2014-01-02), TPCi Rules Team (2014-05-08)

Relevant cards

Note: All applicable cards may not be listed below.
BW10_9
BW10_96
HGSS2_34
HGSS3_48
HSP_HGSS17
HSP_HGSS17