You can make this go that much further to being one-sided by running a bunch of Vigilance, or putting into the flavor-of-the-month deck: a vehicles deck
Burned: When an effect or attack Burns your Pokemon, you will place a Burn Counter and two damage counters (10 damage each) on top of the card
While overall supply also plays a role in the price, the fact may be that more people are keeping the Pokemon Center version of Destined Rivals ETBs sealed rather than opening them
Some decks dont mind dumping cards into the graveyard, making this zombie dinosaur an easy choice for decks using mechanics like madness or delve
This Pachirisu deck, for instance, also won big on the competitive scene
Like most other things in the game, a triggered ability will put the trigger on the stack (where spells and abilities go before they're resolved and become part of the game), and it must be resolved in the same way casting a spell would be