When using Agility in Team Play, can you specify which of the opposing team's Active Pokemon is affected by the Agility effect, or does it HAVE to be the Defending Pokemon that you are attacking with Agility?
It does have a you or your in it, so you would be able to select which opponent's active Pokemon it affects.
Source: WotC Chat (2002-07-18)

Relevant cards

Note: All applicable cards may not be listed below.
WOTCB2_16
WOTCB2_16
WOTCB2_41
WOTCB2_41
WOTCB1_14
WOTCFO_42
WOTCGH_63
WOTCJU_36
WOTCJU_44
WOTCLC_42
WOTCLC_60
WOTCLC_63
WOTCN1_58
WOTCN1_70
WOTCN1_8
WOTCN3_23
WOTCN4_55
WOTCSI_7