Burned Pokmon remain burned even if evolved or devolved
Pecharunt ex, for example is essentially a staple in any deck with dark type Pokemon, enabling you to make the switch to the active spot much more easily
But before we get there: what's ahead
It is quite another to cast Cathartic Reunion, mill over half your deck, then cast Dread Return for free, putting some giant lock piece like Iona, Shielf of Emeria onto the battlefield
Best case scenario, you remove two small creatures and draw a card
As an aside, while I said Dispel isnt an effective sideboard card because Rally will often just be able to take it with Duress before casting their critical spell, that concern doesnt exist in game 1, where Dispel is excellent against them