Trainers » *Trainers in General
If I use Pokémon Trader or Energy Search and there aren't any Pokémon or Energy in my deck, do I have to show my deck to my opponent? If there isn't any in my deck, do I get to put the Pokémon Trader or Energy Search back in my hand either?
You don't have to show your deck and you don't put the trainer back in your hand [Ed. note: It goes into the discard pile].
Source: WotC Chat (2000-08-17)
Trainers » PlusPower
If you use a PlusPower on a attack that does 0 damage, will it do 10 damage? Like for example, Kangaskhan's Fetch will it do 10 damage with a PlusPower?
No, PlusPower will only add 10, *if* damage is done. Fetch doesn't do damage.
Source: WotC Chat (2000-06-01)
Trainers » PlusPower
Can you [play] more than one PlusPower[?] 2, 3, 4?
Well you can have up to 4 in your deck, so if you had all 4 in your hand you could use them all at once yes.
Source: WotC Chat (2000-05-18)
Trainers » PlusPower
Does a PlusPower work with Hitmonlee's Stretch Kick attack?
It does not. Pluspower only adds to the total if the attack does damage to the [Active] Pokémon only.
Source: WotC Chat (2000-05-11)
Trainers » *Trainers in General
When you use a Trainer card, first you pay the cost (if any), then you resolve the effect of the Trainer card, then you discard that Trainer card. So you could NOT use Item Finder to bring itself back from the discard pile (you would discard 2 other cards from your hand, then pull a Trainer card from your discard pile to your hand, THEN you would discard the Item Finder).
Source: WotC Chat (2000-03-02)
Trainers » Switch
Can the Switch card be used to retreat a Paralyzed, Confused, or Sleeping Pokémon?
Yes, you can use a Switch card to retreat a Confused, Asleep or Paralyzed Pokémon.
Source: WotC Chat (2000-02-03)