With how popular the game is already, we can only assume this will be another bump
This card goes in that deck, too, and its under $5 for now
Next up, you will want to fill the blanks with all the cheaper Arabian Night cards
It usually costs less to jump into than the biggest EX-era headliners, but prices have been creeping up as more collectors look past the obvious sets
Professors Research in Sword & Shield has the exact same effect, but like Hop is a Supporter card, limiting its use to one turn
If you just want to stomp the game I think things are easiest with Squirtle and friends by far, since you can build it into a Rain Dance deck later and have something that's out of any of the CPU trainers' league, whereas Charizard and Venusaur aren't as competitively powerful(though Pokemon Center cheese with Venusaur is pretty entertaining...), but you can really get away with doing a decent version of whatever you feel like running so I'd just go with whatever you think sounds fun