Honestly being new into this truly pains me so I'll summarize of everything I did.
I downloaded this file, opened PKHEX and went directly to ''Block data'', then I searched ''NormalEncount'' at ''Block Key'', I selected ''Imput Current block and chose the file ''NormalEncount'' as well from the extracted files, I did the same with other files like searching normal encount rigel1 and 2 and chose the rigel 1 and 2 from the extracted files respectively, (I'm sure that I did with every single file; bonus reward, dai encount, drop rewards, normal encount, and normal encount rigel 1 + 2) after that I saved my save and I exported it. Now I assume that if I go to den 037 aka Giant's seat 4 and keep trying to use wishing star eventually a gigantamax lapras raid will pop up right?
I'm sorry if I'm doing a mistake lol I'm extremetely new into this.