Advanced format ruling
Pineapple Blast
Card effect (current official text)When you Normal Summon a monster, if your opponent controls more monsters than you do: Destroy your opponent's monsters so that your opponent controls the same number of monsters as you (your opponent chooses which of their monsters are destroyed).
Current rulings for this card are maintained by Konami.
Rulings data courtesy of Format Library — formatlibrary.com. Spotted an inaccuracy? Flag it in the Advanced forum — sourced change requests get reviewed.