After years of seeing what decks with too much search power can do, Rainbow Bridge still got printed as recently as 2018
That said, this does mean you have an obvious (and relatively cheap) first step to take when going about upgrading the deck
Yes, Roserade isn't a popular Pokemon by any stretch of the imagination, but considering the presence of Cynthia and the card's amazing artwork, expect it to get more attention down the road
Everyone is friendly and more than willing to show off their collections of shiny cards if asked, when passing by tables on the way to the bars imposing wall of board games
Red and black have the most consistent ones, in my opinion
Released in 2008's Great Encounters, the Pokmon was so critical to the meta, if you didn't have a Claydol to stick in your deck, your opponent was guaranteed to run rings around you