Please note the three cards are receiving errata to address text changes. The text below reflects what the card should say, not what was originally printed. Additionally, we have added notes to help understand what has changed on the cards. You can see a complete list of TCG Errata on the rules and resources page.

Lucky Egg (Platinum—Arceus, 88/89)
When the Pokémon this card is attached to is Knocked Out by damage from an opponent’s attack and put into your discard pile, draw cards until you have 7 cards in your hand.

If the Pokémon does not go to the discard pile (for example, if it goes to the Lost Zone, etc.), you do not get to draw the cards.

Onix (HS—Unleashed, 56/95)
(Poké-Body) Energy Healer
When you attach an Energy card from your hand to Onix, remove a damage counter from Onix.

This Poké-Body only works when you attach an Energy card to Onix.

PlusPower (HS—Unleashed, 80/95)
If the Pokémon PlusPower is attached to attacks, the attack does 10 more damage to the Active Pokémon (before applying Weakness and Resistance).

This is to match past versions of the card.  Also, if the Pokémon uses an attack that would damage itself, PlusPower would also affect that damage.