Her synergy with repeatable mill cards makes her ideal for slow, value-focused decks
During damage calculation, if your Pendulum Monster attacks an opponent's monster: You can make that opponent's monster lose 100 ATK for each "Performapal" and "Odd-Eyes" card you control, during damage calculation only
The Owl is probably better with that ability to grow bigger and the better evasive ability
Swampert looks ready to break through the frame of this card, and at its relatively affordable current price, it wouldn't be surprising to see it break out of its current price range and into the upper echelon of Mega Pokemon
Whenever he deals damage to a player, you can choose to trigger any number of his three effects
Jeskai Revelation is also a strong target, but so are cheaper spells like card draw or counterspells